Software

A “computer” includes hardware, an operating system (OS) as well as the software that runs on that combination:

Computers have become smaller, more compact, more powerful and are far more portable. Mobile is becoming so much a part of our lives that there are now more such devices than people on the planet.

Computer hardware and software are interdependent — you need newer (and more powerful) hardware to run newer versions of both the operating systems and programs that run on them. You cannot run softwa [..]

As noted above, software includes both the operating system

Current software and hardware can be either 32- or 64-bit (older systems were 8- and 16-bit). Think of the difference between a two-, four- and eight-lane highway and that will help you to picture the [..]

The operating system (sometimes abbreviated as OS) is the main software running on a computer and will dictate a great deal about what hardware will work and what software is available to run on any p [..]

Current computer operating systems include various versions of Microsoft Windows

Mobile devices run operating systems as well: Apple's iOS

Earlier versions of PCs ran command-line operating systems like DOS