There are two main common types of operating systems for computers. One is windows and the other is mac. Otherwise known as PC and mac. PC tends to be easier to use for beginners while macs are often used in offices and schools.
Desktop Compact Computer
You obviously use your computer, and you use the keyboard that's on your computer, you type the words that are on the keys, and press space after every word :)
to type in stuff :)
Asus Laptop
The operating system runs your computer and lets you use it.
The computer
keyboard
Use your keyboard and it will automatically type on your computers screen.
The type of energy a computer uses is electricty.
DVI is the video support/connection type that the computer use's. Not all computers use it though.
computer
Depends on the inputs on the TV and outputs on the computer. You can use Firewire, USB, or component.