Software is a set of instructions, data, or programs used to operate a computer and execute specific tasks. In simpler terms, software tells a computer how to function. It’s a generic term used to refer to applications, scripts, and programs that run on devices such as PCs, mobile phones, tablets, and other smart devices. Software contrasts with hardware, which is the physical aspects of a computer that perform the work.

Without software, most computers would be useless. For example, a web browser is a software application that allows users to access the internet. Without the web browser software, reading this page on Webopedia wouldn’t be possible. An operating system (OS) is a software program that serves as the interface between other applications and the hardware on a computer or mobile device. TCP/IP is built into all major operating systems to allow computers to communicate over long distance networks. Without the OS or the protocols built into it, it wouldn’t be possible to access a web browser.

The majority of software is written in high-level programming languages due to the language being closer to natural human language as opposed to machine language. The high-level language is then translated into low-level machine code using a compiler or interpreter for the computer to understand. Software can also be written in a low-level assembly language, but it is less common.