Because this is the operating system on the majority of new computers purchased by new computer users. This month's column will deal with the most basic skills to using a computer, using the mouse to get to the interactive tutorials. Your key to using the computer is the mouse. The Windows 98 Discovery Tutorial contains an excellent interactive tutorial on using the mouse. However, you have to have some knowledge of using a mouse and Windows to access it.
Input is whatever goes to the computer.
It could come from you via the keyboard or mouse or even data received from another device. The classic analogy used to illustrate input and output is the television set. Primarily, the television is an output device. The input part of a television would be the remote control. This allows you to send information to the television as to what channel to watch or how to adjust the volume, etc.