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A software system is a system of intercommunicating components based on software forming part of a computer system (a combination of hardware and software). It "consists of a number of separate programs, configuration files, which are used to set up these programs, system documentation, which describes the structure of the system, and user documentation, which explains how to use the system".
Software consists of computer programs that instruct the execution of a computer. [1] Software also includes design documents and specifications. The history of software is closely tied to the development of digital computers in the mid-20th century.
SunOS 1: MS-DOS 3 System Software: Windows 1.0 Atari TOS AmigaOS: AIX 1: Computer networks: ARPANET splits off MILNET: Novell NetWare Research In Motion founded: NSFNET connects 5 Supercomputers: Computer graphics: ATI founded: Intel 82786 coprocessor Word processors: Word 1 for DOS: Word 1 for Mac: WordPerfect 4.2 for DOS: Spreadsheet: Excel ...
It comprises procedures, algorithms, and documentation concerned with the operation of a data processing system. The term was coined to contrast to the term hardware, meaning physical devices. In contrast to hardware, software "cannot be touched". [1] Software is also sometimes used in a more narrow sense, meaning application software only ...
The software crisis was originally defined in terms of productivity, but evolved to emphasize quality. Some used the term software crisis to refer to their inability to hire enough qualified programmers. [citation needed] Cost and Budget Overruns: The OS/360 operating system was a classic example.
Software architecture erosion may occur in each stage of the software development life cycle and has varying impacts on the development speed and the cost of maintenance. Software architecture erosion occurs due to various reasons, such as architectural violations , the accumulation of technical debt , and knowledge vaporization . [ 40 ]
A software company can compile the program, with or without modifications, and distribute the executable file as a proprietary software product. The X Window System illustrates this approach. The X Consortium releases X11 with distribution terms that make it non-copylefted free software. If you wish, you can get a copy that has those ...
Software industry business models include SaaS (subscription-based), PaaS (platform services), IaaS (infrastructure services), and freemium (free with premium features). Others are perpetual licenses (one-time fee), ad-supported (free with ads), open source (free with paid support), pay-per-use (usage-based), and consulting/customization services.