Introduction to Operating Systems
For those of you new to computers, an Operating System (-or O/S for short) is the program that you use to interact with the hardware components on a day to day basis. It's main objective is to make it possible for non-electrical engineers to use the computer: without one, your computer is just a device that will consume power and blink LEDs at you.
..without [an O/S], your computer is just a device that will consume power and blink LEDs at you
For personal computers in this day and age, it seems that there is only one choice of operating system. PCs normally come pre-loaded with an operating system (-and, almost without exception, the buyer has no say in this) which is either MacOs for Apple products or Microsoft Windows for anything else. There are, however, alternatives – and the best contender (in our opinion) is Linux.