What Are the Services of an Operating System?

When a programmer writes an app, there's some things that they're going to need to do. So instead of everybody reinventing the wheel, what makes a lot of sense is let's provide that functionality built into the operating system. The number of services that the operating system provides has been expanding over time. Operating systems on early personal computers in the 1970s and 1980s would be unrecognizable from operating systems today.