Software development refers to a set of computer science activities dedicated to the process of creating, designing, deploying and supporting software.
Software itself is the set of instructions or programs that tell a computer what to do. It is independent of hardware and makes computers programmable.
-System software to provide core functions such as operating systems, disk management, utilities, hardware management and other operational necessities. An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. For desktop and laptop computers, Windows is the most used at 75%, followed by Apple's macOS at 16%, and Linux-based operating systems, including Google's Chrome OS, at 5% (thereof "desktop Linux" at 2.35%). With tablets, Apple's iOS has 55% and Android has 45%.
-Programming software to give programmers tools such as text editors, compilers, linkers, debuggers and other tools to create code.
-Application software (applications or apps) to help users perform tasks. Office productivity suites, data management software, media players and security programs are examples. Applications also refers to web and mobile applications like those used to shop on Amazon.com, socialize with Facebook or post pictures to Instagram.
-A possible fourth type is embedded software. Embedded systems software is used to control machines and devices not typically considered computers — telecommunications networks, cars, industrial robots and more. These devices, and their software, can be connected as part of the Internet of Things (IoT).
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