Computer software, or simply software, also known as computer programs, is the non-tangible component of computers. Computer software contrasts with computer hardware, which is the physical component of computers. Computer hardware and software require each other and neither can be realistically used without the other.
Computer software includes all computer programs regardless of their architecture; for example, executable files, libraries and scripts are computer software. Yet, it shares their mutual properties: software consists of clearly defined instructions that upon execution, instructs hardware to perform the tasks for which it is designed. Software is stored in computer memory and cannot be touched, just as a 3D model shown in an illustration cannot be touched.
Software is usually written in high-level programming languages that are easier and more efficient for humans to use.
Application software, also known as an application or an app, is computer software designed to help the user to perform specific tasks. Examples include enterprise software, accounting software, office suites, graphics software and media players. Many application programs deal principally with documents. Applications may be bundled with the computer and its system software, or may be published separately. In recent years, the abbreviation “app” has specifically come to mean application software written for mobile devices, with the abbreviation in particular representing both the smaller size and smaller scope of the software (i.e. an app whose sole purpose is to display an image representation of the current weather).