Computer software refers to programs that allow computers to perform tasks. There are several types of software including system software, programming software, application software, and operating systems. System software helps run computer hardware and includes operating systems. Programming software provides tools for programmers to write code in languages like Java, JavaScript, C++, Basic, SQL, Perl and HTML. Application software allows users to perform tasks like using business, education, or medical programs, playing games, or using programs like Word, media players, browsers, spreadsheets, and databases. The most common operating systems are different versions of Windows, Mac OS, and Linux. The best-selling PC game ever is The Sims, in which users control virtual people's lives. Computer