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In excel spreadsheets, you need to consider specifying relationships between the information you have
stored in your spreadsheets when creating formulas. The elements that will help
you understand using spreadsheet are the constants, operators, references and
functions. This will enable you to use the formulas, without hassle in
spreadsheets.
A Mouse and a Keyboard are examples of eternal input devices. The monitor, printer, speaker and Fash drive are all external output devices. Seven basic internal components in a computer tower are the power supply unit, central processing unit, hard disk drive, RAM modules, motherboard, video card and a sound card.