linux vs Windows

Mac OS

I love mac and apple! and also my dad. And.. b'coz this blog is all about compy (and others.. ^^) i took from wikipedia about Mac

"MACOS" redirects here. For the American humanities teaching program, see Man: A Course of Study.

Mac OS

The upcoming release of Mac OS, 10.7 Lion.
Company / developer	Apple
OS family	Mac OS (System 1-7, Mac OS 8-9), Unix (Mac OS X)
Working state	Publicly released
Source model	Closed source (with open source components)
Latest stable release	10.6.7
License	Proprietary EULA
Official website	www.apple.com/macosx/

Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. (formerly Apple Computer, Inc.) for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface. The original form of what Apple would later name the "Mac OS" was the integral and unnamed system software first introduced in 1984 with the original Macintosh, usually referred to simply as the System software.

Apple deliberately downplayed the existence of the operating system in the early years of the Macintosh to help make the machine appear more user-friendly and to distance it from other operating systems such as MS-DOS, which was more arcane and technically challenging. Much of this early system software was held in ROM, with updates typically provided free of charge by Apple dealers on floppy disk. As increasing disk storage capacity and performance gradually eliminated the need for storing much of the advanced GUI operating system in the ROM, Apple explored clones while positioning major operating system upgrades as separate revenue-generating products, first with System 7.1 and System 7.5, then with Mac OS 7.6 in 1997.

Early versions of the Mac OS were compatible only with Motorola 68000-based Macintoshes. As Apple introduced computers with PowerPC hardware, the OS was ported to support this architecture as well. Mac OS 8.1 was the last version that could run on a 68000-class processor (the 68040). Mac OS X, which has superseded the "Classic" Mac OS, is compatible with both PowerPC and Intel processors through to version 10.5 ("Leopard"). Version 10.6 ("Snow Leopard") supports only Intel processors.

The early Macintosh operating system initially consisted of two pieces of software, called "System" and "Finder", each with its own version number. System 7.5.2 was the first to include the Mac OS logo (a variation on the original Happy Mac startup icon), and Mac OS 7.6 was the first to be named "Mac OS".

Before the introduction of the later PowerPC G3-based systems, significant parts of the system were stored in physical ROM on the motherboard. The initial purpose of this was to avoid using up the limited storage of floppy disks on system support, given that the early Macs had no hard disk. (Only one model of Mac was ever actually bootable using the ROM alone, the 1991 Mac Classic model.) This architecture also allowed for a completely graphical OS interface at the lowest level without the need for a text-only console or command-line mode. Boot time errors, such as finding no functioning disk drives, were communicated to the user graphically, usually with an icon or the distinctive Chicago bitmap font and a Chime of Death or a series of beeps. This was in contrast to PCs of the time, which displayed such messages in a mono-spaced font on a black background, and required the use of the keyboard, not a mouse, for input. To provide such niceties at a low level, Mac OS depended on core system software in ROM on the motherboard, a fact that later helped to ensure that only Apple computers or licensed clones (with the copyright-protected ROMs from Apple) could run Mac OS.

Mac OS can be divided into two families:

• The Mac OS Classic family, which was based on Apple's own code
• The Mac OS X operating system, developed from Mac OS Classic family, and NeXTSTEP, which was UNIX-based.

"Classic" Mac OS (1984–2001)

Main article: History of Mac OS

Original 1984 Macintosh desktop

The "classic" Mac OS is characterized by its total lack of a command line; it is a completely graphical operating system. Versions of Mac OS up through System 4 only ran one application at a time. Even so, it was noted for its ease of use. Mac OS gained cooperative multitasking with System 5, which ran on the Mac SE and Macintosh II. It was criticized for its very limited memory management, lack of protected memory, and susceptibility to conflicts among operating system "extensions" that provide additional functionality (such as networking) or support for a particular device. Some extensions may not work properly together, or work only when loaded in a particular order. Troubleshooting Mac OS extensions could be a time-consuming process of trial and error.

The Macintosh originally used the Macintosh File System (MFS), a flat file system with only one level of folders. This was quickly replaced in 1985 by the Hierarchical File System (HFS), which had a true directory tree. Both file systems are otherwise compatible.

Most file systems used with DOS, Unix, or other operating systems treat a file as simply a sequence of bytes, requiring an application to know which bytes represent what type of information. By contrast, MFS and HFS give files two different "forks". The data fork contains the same sort of information as other file systems, such as the text of a document or the bitmaps of an image file. The resource fork contains other structured data such as menu definitions, graphics, sounds, or code segments. A file might consist only of resources with an empty data fork, or only a data fork with no resource fork. A text file could contain its text in the data fork and styling information in the resource fork, so that an application, which doesn’t recognize the styling information, can still read the raw text. On the other hand, these forks provide a challenge to interoperability with other operating systems; copying a file from a Mac to a non-Mac system strips it of its resource fork, necessitating such encoding schemes as BinHex and MacBinary.

PowerPC versions of Mac OS X up to and including Mac OS X v10.5 Leopard (support for Classic was dropped by Apple with Snow Leopard's release and it is no longer included) include a compatibility layer for running older Mac applications, the Classic Environment. This runs a full copy of the older Mac OS, version 9.1 or later, in a Mac OS X process. PowerPC-based Macs shipped with Mac OS 9.2 as well as Mac OS X. Mac OS 9.2 had to be installed by the user — it was not installed by default on hardware revisions released after the release of Mac OS X 10.4 Tiger. Most well-written "classic" applications function properly under this environment, but compatibility is only assured if the software was written to be unaware of the actual hardware, and to interact solely with the operating system. The Classic Environment is not available on Intel-based Macintosh systems due to the incompatibility of Mac OS 9 with the x86 hardware.

Users of the classic Mac OS generally upgraded to Mac OS X, but many criticized it as being more difficult and less user-friendly than the original Mac OS, for the lack of certain features that had not been re-implemented in the new OS, or for being slower on the same hardware (especially older hardware), or other, sometimes serious incompatibilities with the older OS. Because drivers (for printers, scanners, tablets, etc.) written for the older Mac OS are not compatible with Mac OS X, and due to the lack of Mac OS X support for older Apple machines, a significant number of Macintosh users have still continued using the older classic Mac OS.

In June 2005, Steve Jobs announced at the Worldwide Developers Conference keynote that Apple computers would be transitioning from PowerPC to Intel processors and thus dropping compatibility on new machines for Mac OS Classic. At the same conference, Jobs announced Developer Transition Kits that included beta versions of Apple software including Mac OS X that developers could use to test their applications as they ported them to run on Intel-powered Macs. In January 2006, Apple released the first Macintosh computers with Intel processors, an iMac and the MacBook Pro, and in February 2006, Apple released a Mac mini with an Intel Core Solo and Duo processor. On May 16, 2006, Apple released the MacBook, before completing the Intel transition on August 7 with the Mac Pro. To ease the transition for early buyers of the new machines, Intel-based Macs include an emulation technology called Rosetta, which allows them to run Mac OS X software that was compiled for PowerPC-based Macintoshes. Rosetta runs transparently, creating a user experience identical to running the software on a PowerPC machine, though execution is typically slower than with native code.

Mac OS X

Main article: Mac OS X

Mac OS X is the newest of Apple Inc.'s Mac OS line of operating systems. Although it is officially designated as simply "version 10" of the Mac OS, it has a history largely independent of the earlier Mac OS releases.

The operating system is the successor to Mac OS 9 and the "classic" Mac OS. It is a Unix operating system, based on the NeXTSTEP operating system and the Mach kernel which Apple acquired after purchasing NeXT Computer, with its CEO Steve Jobs returning to Apple at this time. Mac OS X also makes use of the BSD code base. There have been six significant releases of the client version, the most recent being Mac OS X 10.6, referred to as Snow Leopard. On Apple's October 20th 2010 "Back to the Mac" event, Mac OS X 10.7 Lion was previewed, showing improvements and additions including a Mac App Store.

As well as the client versions, Mac OS X has also had six significant releases as a server version, called Mac OS X Server. The first of these, Mac OS X Server 1.0, was released in beta in 1999. The server versions are architecturally identical to the client versions, with the differentiation found in their inclusion of tools for server management, including tools for managing Mac OS X-based workgroups, mail servers, and web servers, amongst other tools. It was the default operating system for Xserve (which has now been discontinued), it's an optional feature on the Mac Mini and the Mac Pro, and it's also installable on most other Macs. Unlike the client version, Mac OS X Server can be run in a virtual machine using emulation software such as Parallels Desktop.

Mac OS X is also the basis for iOS, (previously iPhone OS) used on Apple's iPhone, iPod Touch, and iPad.

Star Trek

Main article: Star Trek project

Star Trek (as in "to boldly go where no Mac has gone before") was a relatively unknown secret prototype Apple started work on in 1992, which goal was to create a version of the classic Mac OS that would run on Intel-compatible x86 personal computers. The project was instigated by Novell, Inc., who were looking to integrate their DR-DOS with the Mac OS UI as a retort to Microsoft's Windows 3.0. The Apple/Novell team (fourteen engineers from the former, four from the latter) was able to get the Macintosh Finder and some basic applications, like QuickTime, running smoothly on a PC. Some of the code from this effort was reused when porting the Mac OS later to PowerPC.

The project was short lived, being canceled only one year later in early 1993. There are two theories for the cancellation: the first is that Apple's board canceled further development upon realizing that going with Star Trek would mean an entirely new business model and one that would likely see a notable drop in Apple's lucrative hardware sales; and the second is that an x86 Mac OS was not commercially viable in the early nineties because Microsoft's contracts for Windows 3.1 forced PC manufacturers to pay a royalty to Microsoft for every computer shipped, regardless of what operating system it contained.

A further complication was that Star Trek was designed to be source-level compatible, not binary compatible, with the Mac OS. Mac applications would therefore have to be recompiled or rewritten by their developers to run on the x86 architecture, and there was much skepticism as to exactly how much work this would entail.

Fifteen years after Star Trek, support for the x86 architecture was officially included in Mac OS, and then Apple transitioned all desktop computers to the x86 architecture. This was not the direct result of earlier Project Star Trek efforts. The Darwin underpinning used for Mac OS X 10.0 and later included support for the x86 architecture. The remaining non-Darwin portion of Mac OS X (based on OPENSTEP, which ran on Intel processors) was released officially with the introduction of x86 Macintosh computers.

68000 emulation

Although the Star Trek software was never released, third-party Macintosh emulators, such as vMac, Basilisk II, and Executor, eventually made it possible to run the classic Mac OS on Intel-based PCs. These emulators were restricted to emulating the 68000 series of processors, and as such most couldn't run versions of the Mac OS that succeeded 8.1, which required PowerPC processors. Most also required a Mac ROM image or a hardware interface supporting a real Mac ROM chip; those requiring an image are of dubious legal standing as the ROM image may infringe on Apple's intellectual property.

A notable exception was the Executor commercial software product from Abacus Research & Development, the only product that used 100% reverse engineered code without the use of Apple technology. It ran extremely quickly but never achieved more than a minor subset of functionality. Few programs were completely compatible and many were extremely crash-prone if they ran at all. Executor filled a niche market for porting 68000 classic Mac applications to x86 platforms; development ceased in 2002 and the source code was released by the author in late 2008.

Emulators using Mac ROM images offered near complete Mac OS compatibility and later versions offered excellent performance as modern x86 processor performance increased exponentially.

Most of the Mac user base had already started moving to the PowerPC platform that offered backward compatibility on 8.xx & 9.xx operating systems along with faster PowerPC software support. This helped ease the transition to PowerPC-only applications while prematurely obsolescing 68000 emulators and the Classic-only applications they supported well before these emulators were refined enough to compete with a real Mac.

PowerPC emulation

At the time of 68000-emulator development PowerPC support was difficult to justify not only due to the emulation code itself but also the anticipated wide performance overhead of an emulated PowerPC architecture vs. a real PowerPC based Mac. This would later prove correct with the start of the PearPC project even years later despite the availability of 7th & 8th generation x86 processors employing similar architecture paradigms present in the PowerPC. Many application developers were also creating and releasing both 68000 Classic and PowerPC versions concurrently helping to negate the need for PowerPC emulation. PowerPC Mac users who could technically run either obviously chose the faster PowerPC applications. Soon Apple was no longer selling 68000-based Macs and the existing installed base started to quickly evaporate. Despite the eventual excellent 68000-emulation technology available they proved never to be even a minor threat to real Macs due to their late arrival and immaturity even several years after the release of much more compelling PowerPC based Macs.

The PearPC emulator is capable of emulating the PowerPC processors required by newer versions of the Mac OS (like Mac OS X). Unfortunately, it is still in the early stages and, like many emulators, tends to run much slower than a native operating system would.

During the transition from PowerPC to Intel processors, Apple realized the need to incorporate a PowerPC emulator into Mac OS X in order to protect its customers' investments in software designed to run on the PowerPC. Apple's solution is an emulator called Rosetta. Prior to the announcement of Rosetta, industry observers assumed that any PowerPC emulator running on an x86 processor would suffer a heavy performance penalty (e.g., PearPC's slow performance). Rosetta's relatively minor performance penalty therefore took many by surprise.

Another PowerPC emulator is SheepShaver, which has been around since 1998 for BeOS on the PowerPC platform, but in 2002 was open sourced with porting efforts beginning to get it to run on other platforms. Originally it was not designed for use on x86 platforms and required an actual PowerPC processor present in the machine it was running on similar to a hypervisor. Although it provides PowerPC processor support, it can only run up to Mac OS 9.0.4 because it does not emulate a memory management unit.

Other examples include ShapeShifter(by the same programmer that conceived SheepShaver), Fusion and iFusion. The latter ran classic Mac OS with a PowerPC "coprocessor" accelerator card. Using this method has been said to equal or better the speed of a Macintosh with the same processor, especially with respect to the m68k series due to real Macs running in MMU trap mode, hampering performance.

Macintosh clones

Main articles: Macintosh clone and OSx86

Several computer manufacturers over the years have made Macintosh clones capable of running Mac OS, notably Power Computing, UMAX and Motorola. These machines normally ran various versions of classic Mac OS. Steve Jobs ended the clone-licensing program after returning to Apple in 1997.

In 2008, a manufacturing company in Miami, FL called Psystar Corporation, announced a $499 clone that comes with a barebones system that can run Mac OS X 10.5 Leopard. Threatened with legal battles, Psystar originally called the system OpenMac and have since changed it to Open Computer. Apple filed a lawsuit with the company and asked that Psystar be ordered to stop producing clone systems, recall every system sold, and pay monetary damages. Eventually, Apple prevailed in court, and the Open Computer's production was ceased. Psystar itself appears to be defunct now, as the company's website is gone.

A/UX

Main article: A/UX

In 1988, Apple released its first UNIX-based OS, A/UX, which was a UNIX operating system with the Mac OS look and feel. It was not very competitive for its time, due in part to the crowded Unix market. A/UX had most of its success in sales to the U.S. government, where UNIX was a requirement that Mac OS could not meet. Mac OS X later incorporated code from the UNIX-based NeXTStep after Steve Jobs rejoined Apple in 1997.

MAE

Main article: Macintosh Application Environment

The Macintosh Application Environment (MAE) was a software package introduced by Apple Computer in 1994 which allowed users of certain Unix-based computer workstations to run Apple Macintosh application software.

MAE used the X Window System to emulate a Macintosh Finder-style graphical user interface. The last version, MAE 3.0, was compatible with System 7.5.3.

MAE was available for Sun Microsystems SPARCstation and Hewlett-Packard systems. It was discontinued on May 14, 1998.

MkLinux

Main article: MkLinux

Announced at The 1996 World Wide Developers Conference (WWDC), MkLinux is an open source computer operating system started by the OSF Research Institute and Apple Computer in February 1996 to port Linux to the PowerPC platform, and thus Macintosh computers. In the summer of 1998, the community-led MkLinux Developers Association took over development of the operating system. 

MkLinux is short for "Microkernel Linux," which refers to the project's adaptation of the Linux kernel to run as a server hosted atop the Mach microkernel. MkLinux is based on version 3.0 of Mach.

Mac OS on non Apple-labeled computers

Main article: OSx86

Though a violation of Apple's EULA, running Mac OS X operating systems compiled for x86 on a non-Apple PC is possible using various kernel modifications, third-party and community drivers, and emulation methods. For example, the PC-EFI project emulates the Extensible Firmware Interface that is normally present on Apple's Intel-based Macs, allowing Mac OS X to be installed on non-Apple hardware.

Information System

In a general sense, the term Information System (IS) refers to a system of people, data records and activities that process the data and information in an organization, and it includes the organization's manual and automated processes. In a narrow sense, the term information system (or computer-based information system) refers to the specific application software that is used to store data records in a computer system and automates some of the information-processing activities of the organization. Computer-based information systems are in the field of information technology. The discipline of business process modelling describes the business processes supported by information systems. 

There are various types of information systems, for example: transaction processing systems, decision support systems, knowledge management systems, database management systems, and office information systems. Critical to most information systems are information technologies, which are typically designed to enable humans to perform tasks for which the human brain is not well suited, such as: handling large amounts of information, performing complex calculations, and controlling many simultaneous processes.
Information technologies are a very important and malleable resource available to executives.^[1] Many companies have created a position of Chief Information Officer (CIO) that sits on the executive board with the Chief Executive Officer (CEO), Chief Financial Officer (CFO), Chief Operating Officer (COO) and Chief Technical Officer (CTO).The CTO may also serve as CIO, and vice versa. The Chief Information Security Officer (CISO), who focuses on information security within an organization, normally reports to the CIO.
In computer security, an information system is described by the following components ^[2]:

• Repositories, which hold data permanently or temporarily, such as buffers, RAM, hard disks, cache, etc. Often data stored in repositories is managed through a database management system.
• Interfaces, which support the interaction between humans and computers, such as keyboards, speakers, scanners, printers, etc.
• Channels, which connect repositories, such as routers, cables, etc.

Information technology departments in larger organizations tend to strongly influence information technology development, use, and application in the organizations, which may be a business or corporation. A serous of methodologies and processes can be used in order to develop and use an information system. Many developers have turned and used a more engineering approach such as the System Development Life cycle (SDLC) which is a systematic procedure of developing an information system through stages that occur in sequence. An Information system can be developed in house( within the organization)or outsourced. This can be accomplished by outsourcing certain components or the entire system.^[3]

• A computer based information system, following a definition of Langefors^[4], is:
  
• a technologically implemented medium for recording, storing, and disseminating linguistic expressions,
• as well as for drawing conclusions from such expressions.

which can be formulated as a generalized information systems design mathematical program

iPhone Connects to computer

Computers and iPods go hand-in-hand. You cannot use an iPod without a computer. As in most cases, where there is good compatibility, there is seldom a chance of conflict. But incase of an iPod and a system, sometimes this proves to be incorrect.

When we buy any new gadget or electronic device we take pains to make sure it is compatible with what we already have. Same with an iPod, one always ensures that the OS one has is compatible with the new iPod.

 

However in some cases, especially for amateurs, we overlook certain factors. This leads to conflicts between the devices further leading to data loss. One can use an iPod recovery software in such a dire situation.

For example, when a person buys a new iPod the first thing he/she does is connects it to the computer The computer gives you a message saying that the iPod needs to be scanned and fixed, or if you want to continue without scanning.

The computer to hang no matter which option you choose. You then realise that all the music and other data from your iPod is deleted.

 

Cause:

The USB cable you are using is not compatible with the computer. The iPod may not be have some sort of a virus/malware which transferred to the computer. The iTunes being used may not be compatible with the OS. Or it may be too heavy an application, thus making the system slow.

Whichever be the case, if the iPod data gets erased, it's because it was not ejected properly.

 

Solution:

Although viruses and bugs in an iPod are rare, it's not impossible to have one. They get downloaded with the music from unsafe sites. More often than not, they are harmless to the iPod but pose great threat to the system.

If the USB cable is the problem, all one has to do is get a new USB 2.0 adapter and ensure it is configured to the computer.

 

Whichever be the case, if the computer has hung, you can retrieve lost data using either a backup or any of the numerous data recovery softwares available. When a computer crashes while an iPod is still connected to it, the later too invariably loses data. This data too can be recovered using an iPod Recovery Software. Connect the iPod to the computer, install the software-thats all it takes!! It then scans the iPod, and recovers all iPod data.

 

Stellar Phoenix iPod Recovery, an extremely user friendly software, enables us to recover data not only quickly but also efficiently. This software supports MIDI, AVI, MOV, MP3, MP4 etc formats enabling it to recover all iPod data.

iPod Connects To Computer   by Simpson

Kimi Ni Todoke

 

Anime Kimi ni Todoke ^^

Come On! さんはこのブログで私と一緒にこのアニメを共有しましょう！

http://www.ichadan.blogspot.com

*promosi :D

Local Area Network (LAN)

LAN adalah kumpulan dari komputer, printer dan perangkat-perangkat lain yang saling berhubungan.

Karakteristik LAN :

Keterbatasan area/geografi operasi

Transfer data kecepatan tinggi.

Koneksi terus-menerus ke servis lokal

Umumnya lebih murah dari jaringan WAN

Kable adalah media transmisi utama.

Desain LAN

Duah persoalan utama dalam mendesain dan mengimplementasikan LAN adalah :

1. Jarak

2. Biaya

Jarak

Local Area Network (LAN) dibatasi oleh jarak. Penyebab utamanya adalah keterbatasan media transmisi. Kabel yang membawa trafik data akan mengalami redaman sehingga tidak mampu membawa trafik data pada jarak yang sangat jauh. Untuk jarak tertentu dapat digunakan repeater/penguat sinyal sepanjang jalur transmisi.

Anda dapat bayangkan jika jaringan anda di Jakarta ingin terhubung dengan jaringan anda diSurabaya. Hal ini tidak memungkinkan jika anda menggunakan repeater/penguat sinyal sepanjang lintasan, karena akan sangat terlalu mahal. Solusi untuk menghubungkan antara LAN anda di Jakarta dengan LAN anda di Surabaya adalah dengan menggunakan WAN.

Visual Basic

Konsep Dasar Bahasa Pemograman Visual Basic 6.0

Sejarah Visual Basic

 

Visual Basic pada dasarnya adalah sebuah bahasa pemrograman komputer, yang didalamnya terdapat perintah-perintah atau instruksi-instruksi yang dimengerti oleh komputer untuk melakukan tugas-tugas tertentu.

Visual Basic (yang disingkat dengan VB) selain disebut sebagai bahasa pemograman, juga sering disebut sebagai sarana (tool) untuk menghasilkan program-program aplikasi berbasiskan windows. Beberapa kemampuan atau manfaat dari Visual Basic diantaranya adalah:

1. Untuk membuat program aplikasi berbasis Windows.

Untuk membuat objek-objek pembantu seperti misalnya Control ActiveX, File Help, aplikasi internet dan lain sebagainya.

2. Menguji program (debugging) dan menghasilkan program akhir berakhiran exe yang bersifat executable atau dapat langsung dijalankan.

Stuktur Program Visual Basic

Dalam membuat program, aspek utama yang harus diketahui oleh pemograman adalah struktur program. Programa akan berjalan baik, jika mempunyai struktur program yang benar. Begitu pula dengan membuat program dengan Visual Basic. Pemograman harus mengetahui struktur program yang berlaku pada Visual Basic.

Agar dapat merancang sebuah program dengan baik dan terarah, sebaiknya harus mengenal terlebih dahulu struktur program dalam Visual Basic.

Secara umum struktur program Visual Basic terdiri dari dua bagian, yaitu bagian deklarasi program dan bagian pernyataan program.

1. Bagian deklarasi Program

Bagian ini merupakan bagian peletakan semua deklarasi data yang akan digunakan. Secara umum kata cadangan yang merupakan bagian dari deklarasi adalah: Dim, Private, Const, dan type.

 

a. Deklarasi Dim atau Dimension.

Dim atau Dimension adalah kata cadangan yang sering dipakai mendeklarasikan Variabel yang akan digunakan dalam visual Basic. Pendeklarasian dengan pernyataan Dim berlaku pada pemograman modul, program dan sub-program.

 

b. Deklarasi Publik

Publik merupakan pernyataan yang menggantikan pernyataan global dalan Visual Basic. Pernyataan Publik menyatakan bahwa semua variabel yang dideklarasikan oleh pernyataan berlaku secara umum. Publik merupakan pernyataan level modul, artnya pernyataan ini pada dasarnya dideklarasikan pada semua modul.

 

c. Deklarasi Private

Private menyatakan bahwa semua variabel yang dideklarasikan oleh pernyataan berlaku secara khusus (private). Pernyataan private merupakan pernyataan level sub-program, artinya pernyataan yang pada dasarnya dideklarasikan pada sebuah sub-program.

 

d. Deklarasi Statis

Static sering digunakan untuk suatu variabel atau nilai agar tepat atau tidak berubah, selama program dijalankan. Pernyataan statik merupakan pernyataan level sub-program, artinya pernyatan yang pada dasarnya dideklarasikan pada bagaia sub-program.

 

e. Deklarasi Const atau Constanta

Const atau constanta sering dipakai pada bagian deklarasi untuk memberikan harga konstan pada suatu variabel. Const merupakan pernyataan level modul, artinya pernyataan yang pada dasarnya dideklarasikan pada modul. Dalam prakteknya pernyataan const sering dipandu dengan pernyataan publik atau private.

 

f. Deklarasi Type

Type dipakai bada bagian deklarasi untuk mendefenisiskan type data terdefenisi. Dimana type data ini dapat mengandung satu atau lebih dari suatu type data.

Type merupakan pernyataan level modul, artinya pernyataan yang pada dasarnya dideklarasikan pada modul. Dalam prakteknya pernyataan type sering dipandu dengan pernyataan public atau private.

2.  

Ba

 BAGIAN PERNYATAAN PROGRAM

Windows 7

Originally, a version of Windows codenamed Blackcomb was planned as the successor to Windows XP (codename Whistler) and Windows Server 2003. Major features were planned for Blackcomb, including an emphasis on searching and querying data and an advanced storage system named WinFS to enable such scenarios. However, an interim, minor release, codenamed "Longhorn," was announced for 2003, delaying the development of Blackcomb. By the middle of 2003, however, Longhorn had acquired some of the features originally intended for Blackcomb. After three major viruses exploited flaws in Windows operating systems within a short time period in 2003, Microsoft changed its development priorities, putting some of Longhorn's major development work on hold while developing new service packs for Windows XP and Windows Server 2003. Development of Longhorn (Windows Vista) was also restarted, and thus delayed, in August 2004. A number of features were cut from Longhorn.

 

Blackcomb was renamed Vienna in early 2006 and again Windows 7 in 2007. In 2008, it was announced that Windows 7 would also be the official name of the operating system. There has been some confusion over naming the product Windows 7,while versioning it as 6.1 to indicate its similar build to Vista and increase compatibility with applications that only check major version numbers, similar to Windows 2000 and Windows XP both having 5.x version numbers.

 

The first external release to select Microsoft partners came in January 2008 with Milestone 1, build 6519. At PDC 2008, Microsoft demonstrated Windows 7 with its reworked taskbar. Copies of Windows 7 build 6801 were distributed at the end of the conference; however, the demonstrated taskbar was disabled in this build.

On December 27, 2008, Windows 7 Beta was leaked onto the Internet via BitTorrent. According to a performance test by ZDNet, Windows 7 Beta beat both Windows XP and Vista in several key areas; including boot and shutdown time and working with files, such as loading documents. Other areas did not beat XP; including PC Pro benchmarks for typical office activities and video editing, which remain identical to Vista and slower than XP.On January 7, 2009, the 64-bit version of the Windows 7 Beta (build 7000) was leaked onto the web, with some torrents being infected with a trojan. At CES 2009, Microsoft CEO Steve Ballmer announced the Windows 7 Beta, build 7000, had been made available for download to MSDN and TechNet subscribers in the format of an ISO image. The Beta was to be publicly released January 9, 2009, and Microsoft initially planned for the download to be made available to 2.5 million people on this date. However, access to the downloads was delayed because of high traffic. The download limit was also extended, initially until January 24, then again to February 10. 

People who did not complete downloading the beta had two extra days to complete the download. After February 12, unfinished downloads became unable to complete. Users could still obtain product keys from Microsoft to activate their copies of Windows 7 Beta, which expired on August 1, 2009. The release candidate, build 7100, has been available for MSDN and TechNet subscribers and Connect Program participants since April 30 and became available to the general public on May 5, 2009. It has also been leaked onto the Internet via BitTorrent. The release candidate is available in five languages and will expire on June 1, 2010, with shutdowns every two hours starting March 1, 2010. Microsoft stated that Windows 7 would be released to the general public on October 22, 2009. Microsoft released Windows 7 to MSDN and Technet subscribers on August 6, 2009, at 10:00 a.m. PDT. Microsoft announced that Windows 7, along with Windows Server 2008 R2, was released to manufacturing on July 22, 2009. Windows 7 RTM is build 7600.16385, which was compiled on July 13, 2009, and was declared the final RTM build after passing all Microsoft's tests internally. "The launch of Windows 7 has superseded everyone’s expectations, storming ahead of Harry Potter and the Deathly Hallows as the biggest-grossing pre-order product of all-time, and demand is still going strong," claimed managing director Brian McBride, Amazon UK on October 22."

Wired LAN vs Wirless LAN

Wired LAN vs Wireless LAN

Local area network (jaringan komputer lokal) memungkinkan terjadinya pertukaran data dan informasi melalui komputer, dengan menyediakan koneksi yang cepat dan andal. Jaringan komputer konvesional menggunakan media transmisi kabel, coaxial, twisted pair ataupun fiber optic untuk memenuhi kebutuhan tersebut. Pengkabelan ini selain hardware dan software, juga merupakan bagian yang besar dari biaya investasi instalasi sebuah jaringan komputer. Untuk jaringan yang ada pada kantor kantor besar, biaya pengkabelan ini dapat mencapai lebih dari 40% dari biaya total yang dibutuhkan. Masalah akan timbul apabila jaringan akan di konfigurasi ulang atau untuk kantor sementara seperti kantor konsultan. Untuk kasus pengkonfigurasian ulang jaringan, akan dibutuhkan biaya yang hampir sama dengan biaya instalasi LAN baru. Sedangkan pengkabelan LAN untuk kantor yang semantara hanya akan menghabiskan waktu dan uang.

Masalah ini ikut memacu dikembangkannya wireless LAN, mengingat karakteristik sistem wireless yang fleksibel untuk diimplementasikan dimana saja seperti perkantoran, industri, rumah sakit maupun perguruan tinggi. Disamping itu sistem wireless juga menawarkan berbagai aplikasi diantaranya aplikasi komunikasi antar terminal PC dan koneksi ke jaringan telepon misalnya wireless PABX. Dengan pertimbangan tersebut, wireless LAN dapat memberikan biaya instalasi yang lebih ekonomis, disamping sifatnya yang portabel.

Dalam mengimplementasikan indoor wireless LAN digunakan arsitektur seluler dimana gedung akan dibagi dalam beberapa cell dan setiap cell akan memiliki link wireless. Area cakupan wireless tergantung dari beberapa faktor seperti teknologi yang digunakan, lingkungan pengimplementasian, kecepatan data dll.

· Teknologi

Pada prinsipnya pembangunan link wireless pada implementasi wireless LAN tidak hanya dapat dilakukan dengan teknologi frekuensi radio (RF) tetapi juga dapat menggunakan teknologi infra merah. Tetapi pada saat ini teknologi RF lebih banyak dikembangkan untuk kebutuhan sistem wireless. Teknologi RF sendiri terbagi dalam beberapa teknik akses, salah satu diantaranya yaitu teknik Multiple Akses yang paling sering digunakan para vendor sebagai teknik akses produk wireless mereka, yaitu teknik multiple access FDMA, TDMA dan CDMA.

Sejarah Linux & Ms. Office

Waktu semester satu, gue dapet tugas nyari sejarah linux sama Ms. Office, nah ni gue mau tampilin aja sekalian bagi-bagi buat yang dapet tugas sama kayak gue.. hihi ;D

A.    Windows
Sejarah dan Perkembangan Microsoft Windows
Sejarah Awal
•    Pada tahun  1983 Microsoft mengumumkan pembangunan  Windows, sebuah  sistem operasi graphical user interface (GUI) untuk menggantikan operating system (MS-DOS) yang digunakan pada IBM PC sejak tahun 1981.

•    Microsoft membuat sebuah model  GUI, yang pertama kali dikenal sebagai  Interface Manager, setelah munculnya sistem operasi  Apple dengan nama  Mac OS. Bill Gates  sebagai pendiri Microsoft melihat prototipe  Macintosh buatan Steve Jobs pertama kali pada tahun  1981, dan Microsoft bersama dengan Apple membuat beberapa perangkat lunak yang bekerja di bawah Mac seperti  Word and Excel.

•    Versi pertama dari Microsoft Windows adalah versi 1.0, yang dikeluarkan tahun  1985, tetapi kurang populer.
•    Windows 1.0 tidak menyediakan sistem operasi yang lengkap tetapi lebih mirip dengan versi MS-DOS yang diperluas dan masih mempunyai banyak kekurangan.

•    Microsoft Windows versi 2 diciptakan tahun  1987, dan lebih populer dibanding versi sebelumnya, tetapi terus mendapat saingan dari Apple.
•    Sistem operasi ini mendukung aplikasi grafis buatan Microsoft, misalnya Excel dan Word for Windows karena aplikasi tersebut tidak dapat dijalankan dari MS-DOS.
•    Selain itu sistem operasi windows menjadi sebuah platform untuk menjalankan aplikasi  Microsoft Office dan menjadi sebuah sistem operasi  GUI yang bersifat umum.

•    Microsoft Windows menunjukkan kesuksesannya sejak dibuat  Windows 3.0, sekitar tahun 1990.
•    Dengan menambahkan pelbagai kemampuan untuk menjalankan aplikasi.
•    Sistem ini juga mendukung sistem  multitask  dan penambahan lainnya seperti  virtual memory
•    Windows 3.0 dapat dijalankan pada mesin bertipe  386 dan kompatibel dengan prosesor buatan INTEL  dari tipe 8086/8088 sampai ke  80286 & 80386.


•    Selanjutnya  Microsoft melanjutkan pembuatan Windows NT oleh Dave Cutler, dan menjadi sebuah sistem operasi yang dapat dihandalkan.
•    Sistem operasi ini diperkenalkan pertama kali bulan Juli 1992
•    Beberapa fitur dari  Windows NT juga dapat digunakan pada jaringan LAN sehingga menjadi populer

•    Microsoft mengeluarkan  Windows NT 4.0, sebagai kelanjutan dari Windows 95 yang terlebih dahulu dirilis.
•    Windows NT 4.0 mempunyai 4 varian yaitu :
•    Windows NT 4.0 Workstation
•    Windows NT 4.0 Server
•    Windows NT 4.0 Enterprise Server
•    Windows NT 4.0 Terminal Server

Windows 98
•    Dikeluarkan pada tanggal  25 Juni 1998, sebagai perbaikan dari Windows 95.
•    Sistem operasi ini juga terintegrasi dengan  Internet Explorer browser yang lebih baik
•    Tahun  1999, Microsoft mengeluarkan  Windows 98 Second Edition, dengan menambahkan fitur Internet Connection Sharing
Windows 2000
•    Microsoft mengeluarkan  Windows 2000, yang dikenal sebagai  NT 5.0, pada bulan February 2000
•    Windows 2000 muncul dengan empat bentuk yaitu :
•    Windows 2000 Professional
•    Windows 2000 Server
•    Windows 2000 Advanced Server
•    Windows 2000 Datacenter Server
Windows ME
•    Tahun 2000, Microsoft mengenalkan Windows Me (Millennium Edition), yang merupakan perbaikan dari  Windows 98
•    Dengan tambahan  berbagai fitur multimedia, Internet dan utility System Restore
Windows XP
•    Tahun 2001, Microsoft mengeluarkan  Windows XP. Perpaduan dari Windows NT/2000 dan Windows 3.1/95/98/ME .

•    Berbagai jenis varian windows XP antara lain :
•    "Windows XP Home Edition", untuk PC dan  laptops (notebooks)
•    "Windows XP Home Edition N“ (tanpa Windows Media Player )
•    "Windows XP Professional Edition", untuk aplikasi bisnis
•    "Windows XP Professional Edition N“ (tanpa Windows Media Player )
•    Windows XP Media Center Edition (MCE) dengan penambahan fungsi audio, video, and PVR , dikeluarkan bulan November 2002 untuk  desktops and notebooks
•    Windows XP Media Center Edition 2003
•    Windows XP Media Center Edition 2004
•    Windows XP Media Center Edition 2005, dikeluarkan tanggal 12 Oktober 2004.
•    Windows XP Tablet PC Edition, untuk  tablet PCs (notebooks dengan touch screens)
•    Windows XP Embedded, untuk menggabungkan beberapa sistem
•    "Windows XP Starter Edition" untuk negara berkembang
•    Windows XP Professional x64 Edition, dikeluarkan bulan  April 25, 2005 yang mendukung utiliti 64-bit processors
Windows 2003 Server
•    Tanggal 24 April 2003, Microsoft meluncurkan Windows 2003 Server.
•    Windows 2003 mempunyai enam bentuk sistem operasi yaitu :
•    Small Business Server
•    Web Edition
•    Standard Edition
•    Enterprise Edition (32 and 64-bit)
•    Datacenter Edition
•    Storage Server

Fase selanjutnya : Windows Vista & Windows Blackcomb
•    Versi lanjutan dari  Windows adalah  Windows Vista, yang diperkirakan diluncurkan tahun 2006.
•    Vista menambahkan fungsi grafis yang mirip dengan sistem operasi pada  Apple's Mac OS X
•    Versi Server selanjutnya rencananya dikenal dengan nama Vista Server, dan dijadwalkan akan diluncurkan tahun 2007 atau 2009 dengan nama kode Blackcomb.

B.    Microsoft Office
Perkembangan Microsoft Office :

   1. Microsoft Office 3.0. Ternyata yang pertama dirilis adalah versi 3.0. Pada versi ini hanya tersedia untuk OS Windows.
   2. Microsoft Office 4.0. Dirilis pada tahun 1994. Berisi Word 6.0, Excel 5.0, PowerPoint 4.0, Mail and Access.
   3. Microsoft Office 4.3. Seri ini merupakan seri dengan 16-bit yang terakhir dan juga versi terakhir yang mendukung Windows 3.x, Windows NT 3.1 dan Windows NT 3.5
   4. Microsoft Office 95.Atau juga dikenal dengan versi 7.0. Versi ini menggunakan 32-bit agar cocok dengan Windows 95. Office 95 tersedia dalam dua versi, Office 95 Standard dan Office 95 Professional. Yang versi standar terdiri dari Word 7.0, Excel 7.0, PowerPoint 7.0 dan Schedule+7.0. Versi professional terdiri dari semua yang ada di standar ditambah dengan Access 7.0.
   5. Microsoft Office 97. (Office 8.0), Versi ini dirilis dengan banyak fitur dan pengembangan dibandingkan versi sebelumnya. Pengenalan terhadap command bar, sesuatu hal yang baru dimana menu dan toolbar dibuat lebih mirip dengan visual design-nya. Office 97 juga memiliki fitur Natural Language System dan Sophisticated Grammar Checking. Ini versi yang pertama kalinya menggunakan Office Assistant.
   6. Microsoft Office 2000. (Office 9.0) Pada versi ini bayak opsi - opsi disembunyikan. Tentunya opsi tersebut juga penting, tetapi kecil penggunaannya oleh orang awam. Jika ingin digunakan opsi ini dapat dimunculkan. Salah satunya adalah Macro. Mengapa disembunyikan? Karena bisa menyebarkan virus macro. Office 2000 adalah versi terakhir yang bisa dijalankan di Windows 95. Pada versi ini juga tidak ada Product Activation. Enak kan? Product activation mulai ada di versi selanjutnya.
   7. Microsoft Office XP. Bisa disebut sebagai versi 10.0 atau office 2002, merupakan upgrade besar - besaran dengan banyak perkembangan dan perubahan. Office XP mengenalkan fitur Safe Mode. Memungkinkan aplikasi contohnya Outlook untuk bisa booting ketika terjadi kesalahan. Safe mode memungkinkan Office untuk mendeteksi, membetulkan atau mem-bypass sumber dari permasalahan system, seperti registry yang corrupt. Lalu adanya fitur Smart Tag yang memungkinkan mengingatkan user bila ada pengetikan yang salah ejaan. Tetapi pada Office ini Smart Tag hanya bisa dijalankan di Word dan Excel. Office XP juga terintegrasi dengan perintah suara dan pendiktean kata, sebaik mungkin seperti penulisan tangan. Di versi ini ada product activation. Office XP mendukung Windows 98, ME, NT 4.0. Office XP juga dikenal sebagai yang pertama untuk versi Office yang bisa berjalan baik di OS Vista.
   8. Microsoft Office 2003. (Office 11.0). Sesuai namanya, versi ini dirilis pada tahun 2003. Dengan fitur logo baru. Dua aplikasi baru juga ada yaitu, Microsoft InfoPath dan OneNote. Ini versi yang pertama kalinya menggunakan gaya Windows XP beserta Icon-nya. Outlook 2003 memberikan fungsi yang telah berkembang seperti Kerberos authentication, RPC over HTTP, dan Cached Exchange Mode. Pada versi ini juga ada penyaring junk mail yang telah dikembangkan. Office 2003 merupakan versi terakhir yang mendukung Windows 2000. Versi ini juga merupakan versi yang paling banyak dipakai di Indonesia terutama untuk Rental dan Warnet dalam kurun waktu terakhir 2009.
   9. Microsoft Office 2007. (Office 12.0). Versi ini dirilis tahun 2007. Memiliki fitur baru. Juga adanya Groove, sebuah aplikasi kolaborasi. Office 2007 memiliki design tampilan baru yang bernama Fluen User Interface. Lalu adanya Ribbon UI sebagai pengganti menu dan toolbar. Untuk penginstallannya membutuhkan minimal Windows XP SP 2. Pada tahun 2009 Office ini sudah banyak dipakai sekarang dan mulai menggeser kedudukan Office 2003. Indonesia memang agak lambat untuk menyesuaikan diri dengan adanya peningkatan teknologi.
  10. Microsoft Office 2010. (Office 14.0). Untuk sekarang sedang dalam perkembangan. Kemungkinan dirilis adalah pada tahun 2010. Versi 13.0 dilewati karena adanya takhayul terhadap nomor 13!

C.    Linux

Adalah seorang mahasiswa berkebangsaan Filandia yang merupakan orang pertama yang menemukannya. Linus Torvalds, demikianlah nama penemunya. Tak heran jika Linux dipakai menjadi nama operating system seperti nama penemunya. Agustus 1991, Linus mengerjakan versi 0.01. Dan pada tahun yang sama, tepatnya pada tanggal 5 October 1991, secara resmi meluncurkan versi 0.02.

Sejarah Linux Ubuntu.

Ubuntu berasal dari bahasa Afrika yakni “Humanity to Others” yang berarti “Kemanusiaan Untuk Sesama”. Atas dasar itulah diluncurkannya Linux Ubuntu yang dirilis pada tahun 2004. Sistem operasi ini adalah merupakan turunan dari sistem operasi linux yang lain, yakni Debian.

Ubuntu itu sendiri dibuat dengan tujuan : selalu gratis tanpa adanya biaya lisensi, bersifat open source (kode terbuka), dan siap untuk dipergunakan dalam kondisi yang stabil. Ubuntu didukung oleh perusahaan bernama Canonical, Ltd yang memiliki tujuan untuk membantu perkembangan, distribusi, dan promosi dari produk-produk yang bersifat open source (kode terbuka). Perusahaan ini bermarkas di Eropa dan dipimpin oleh seseorang bernama Mark Shuttleworth.

Sejak pertama kali diluncurkan, Ubuntu mendapat perhatian yang sangat besar dari pengguna Linux yang lain. Hal ini disebabkan karena kestabilan yang dimiliki oleh Ubuntu itu sendiri. Selain itu kenyamanan dan kemudahan yang dimiliki Ubuntu menjadi daya tarik yang besar bagi pengguna Linux di seluruh belahan dunia.

Adapun versi Ubuntu yang telah dirilis dan telah beredar adalah sebagai berikut :
1) Versi 4.10 (Warty Warthdog).
2) Versi 5.04 (Hoary Hedgedog).
3) Versi 5.10 (Breezy Badger).
4) Versi 6.06 (Drapper Drake).
5) Versi 6.10 (Edgy Eft).
6) Versi 7.04 (Feisty Fawn).
7) Versi 7.10 (Gutsy Gibbson).

Beberapa waktu yang lalu, Ubuntu telah meluncurkan versi terbaru mereka yakni Ubuntu 8.04 (MID Edition