Parallel port - A socket at the back of a computer for connecting external equipment or peripherals, especially printers.

Peripheral - Any equipment that is connected externally to a computer. (printers, scanners and modems)

Pixel - The image that you see on the screen is made of thousands of tiny dots, points or pixels.

Program Software that operates a PC and does various things.

RAM, ROM - Two types of memory. RAM (Random Access Memory) is the main memory used while the PC is working. RAM is temporary. ROM (Read Only Memory) is for information needed by the PC and cannot be changed.

Resolution - The number of dots or pixels per inch (sometimes per centimetre) used to create the screen image.

Scanner - Equipment for converting paper documents to electronic documents that can be used by a computer.