The tow parts of electricuty is off and on. To represent off and on is o and 1. o
means no power and 1 means there is power.You cant have electicity on.

computer understand colour and lines and alephebet is by bindery code.

There are tow things a computer can understand is on and off. We only have 1's and 0's. You can only have 2 kinds. The more bindery bites we put together you can have more power. 8 peaces of information is called a bite. There are 255 numbers that you can show. A bite well equal A and then it cares on using bindery code. All your computer can understand in bindery code. A preferal is everything attached to PC. Lineput preferal is like a mouse, keybored and ect. Output is a speaker, printer, ect. A PC is a device you can put and take out information from it. The first computer was invented in 1945.