hard disk drive - electro-mechanical data storage device, RAM - computer memory that can be read and changed in any order, typically used to store working data and machine code., ROM - type of non-volatile memory used in computers and other electronic devices. Data cannot be electronically modified after the manufacture of the memory device., CPU - electronic circuitry executes instructions of a computer program, such as arithmetic, logic, controlling, and input/output (I/O) operations., ATM - cash dispenser or cash machine, memory - data on computer, case - enclosure that contains most of the hardware of a personal computer., printer - a peripheral machine which makes a persistent representation of graphics or text, usually on paper., scanner - an input device that analyzes some object (usually its image, text), creates a digital image., mouse - a hand-held pointing device that detects two-dimensional motion relative to a surface., swipe card - A plastic card with a magnetic stripe containing coded data, that is swiped through a reader., barcode - method of representing data in a visual, machine-readable form., keyboard - a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches., monitor - output device that displays information in pictorial or textual form.,

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