IT and Computer People!!

It's called bits (binary digits) 1 is representation of ON and 0 is a representation of OFF, so its ON and OFF. For example your light bulb can either be On or Off, now imagine having them 3 rows and 5 columns, you can visually create an image on that bulb by just turning off some bulb and on with the other. To create a letter L you have to turn on the first bulb and off the 2nd and 3rd of the first row, same with row 2, 3 and 4, but you have to turn on all the bulb on the 5th row. Now thats a letter L.

In computer however, a letter is represented by 8 bits. Letter A could be 01000100, and B is 0100101 and so on and so forth. If your OS is 32 bits then its 4x in speed.

It's hard to do simple explain, I just tell you all computer contents are made up from 0 or 1 which are binary system. If you are not a computer profesional, you will very hard to understand it.

Well Pjsr18, the way we see data on the computer is quite different from the way the built in processors interprete the data.
I don't know if you have heard of low level programming languages like the machine language and later on assembly language. The machine language sees every logical port and accessories attached to the computer in binary units and thus sends info in the same format.
Now for a clearer discription, you know languages like C++, visual basic and so on. These languages are called high level languages and are usually written in human readable forms i.e the language that you and I understand, but in other for these programs to be executed, there is a process called compilation, and it is in this process that these human readable language is now translated into machine readable language for the processor to be able to execute what has been written.
The whole thing is this, the computer interacts with devices and you and I in binary format but has an interpreter or a compiler that translates its binary forms into the humman readable form that you and I understand and vice versa.
I hope you understand this now. All the best..