(This is so gonna be one short of an article..) ok, let's start with the meaning of our said topic, computer.
The shortest, easiest, most comprehensible answer is that a computer is a system with a processing of data that has an input and an output (There, nice and short). Examples of input are mouse, keyboard, and microphone, and for output, there are display monitor, printer, speaker, and projector, to name a few.
Now let's zoom in to look what's inside a computer structure.
Ok, that's the end of this article :)