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A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.

An ink cartridge or inkjet cartridge is a component of an inkjet printer that contains the ink that is deposited onto paper during printing. Each ink cartridge contains one or more ink reservoirs; certain producers also add electronic contacts and a chip that communicates with the printer.

A fax roll is a type of fax paper. The paper is made of thermal paper, similar to the type of paper found in receipt printers on cash registers.