Give TWO examples with its purposes of the following categories of software:
1) General purpose application software
• Microsoft Office Word
Used to create, edit, save, retrieve and print files.
• Microsoft Excel
Used to create certain types of files such as for accounting purposes. For example, for creating ledger or journal.
2) Special purpose application software
• Spreadsheet templates, word processor macros, scientific simulations, graphics and animation scripts. Even email filters are a kind of user software. Users create this software themselves and often overlook how important it is.
3) Programming languages, compilers and Interpreters
• Turbo Pascal is a complete software development system that includes a compiler and an Integrated Development Environment (IDE) for the Pascal programming language running under CP/M, MS-DOS and CP/M-86, developed by Borland under Philippe Kahn's leadership.
• Microsoft QuickBASIC (also QB or incorrectly, "QBasic", which is a different system) is an Integrated Development Environment (or IDE) and Compiler for the BASIC programming language that was developed by Microsoft. QuickBasic runs mainly on DOS, though there was a short-lived version for Mac OS. It is loosely based on GW-BASIC but adds user-defined types, improved programming structures, better graphics and disk support and a compiler in addition to the interpreter. Microsoft marketed QuickBASIC as the introductory level for their BASIC Professional Development System.
• These software are used to develop a certain program(for programmers).
4) Operating systems
• MS-DOS (short for Microsoft Disk Operating System)
5) Utility programs
• Disk defragmenters. Examples include a Disk defragmenter which can detect computer files whose contents have been stored on the hard disk in disjointed fragments, and move the fragments together to increase efficiency; a Disk checker can scan the contents of a hard disk to find files or areas that are corrupted in some way, or were not correctly saved, and eliminate them for a more efficiently operating hard drive; a Disk cleaner can find files that unnecessary to computer operation, or take up considerable amounts of space. Disk cleaner helps the user to decide what to delete when their hard disk is full.
• System Profilers. A System profiler can provide detailed information about the software installed and hardware attached to the computer. Backup software can make a copy of all information stored on a computer, and restore either the entire system (e.g. in an event of disk failure) or selected files (e.g. in an event of accidental deletion). Disk compression software can transparently compress the contents of the hard disk, in order to fit more information to the drive.
• Virus scanners. Virus Scanners scan for computer viruses among files and folders.
• Binary/Hex/Text Editor utility directly modify the text or data of a file without the WYSIWYG view in editor suites. These files could be data or an actual program.
• Archive utilities output a stream or a single file when provided with a directory or a set of files. Archive utilities, unlike archive suites, usually do not include compression or encryption capabilities. Some archive utilities may even have a separate un-archive utility for the reverse operation.
• Compression utilities output a shorter stream or a smaller file when provided with a stream or file.
• Encryption utilities use a specific algorithm to produce an encrypted stream or encrypted file when provided with a key and a plaintext.
• Application launchers provide a convenient access point for application software. See Comparison of applications launchers.
[Quoted from www.en.wikipedia.org]
