The document defines a computer as an electronic machine that takes in raw data as input and converts it into meaningful information. It provides definitions for common computer terms like CPU, hardware, software, input, processing, and output. It also describes different types of computers like personal computers, mini computers, mainframe computers, and super computers. It outlines the basic components and functions of a computer including input devices, output devices, and input/output storage devices. Finally, it lists some common uses of computers in offices, education, hospitals, transportation, banking, and printing.