Introduction to Computers

The computer as we know it is a group of pieces of hardware put together to  get a job done faster. To accomplish its various tasks, the computer is made of different parts, each serving a particular purpose almost independent of, or in conjunction with, other parts. You don't necessarily need to know how these parts operate, at least not at this time, but you should be aware of their co-dependence to take advantage of their various characteristics. 

A computer is primarily made of the Central Processing
Unit (usually referred to as the computer), the monitor, the
keyboard, and the mouse. Other pieces of hardware, commonly referred to as
peripherals, can enhance or improve your experience with the computer.