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• Hardware: Physical and touchable part
• System unit: main part of the microcomputer/ also called a chassis
• Motherboard: main circuit board/ contains all the circuits and components to run the computer
• CPU: train, heart, brain of a computer
• Primary Storage: the computer's working storage space
• ROM: non volatile
• RAM: volatile
• Expansion Bus: data pathway
• Adapters: enable the computer to use a peripheral device
• PSU: installed in the back corner of the pc case
• Hard disk drive: magnetic storage device/ permanent storage
• Optical Disk Drive: storage device that uses lasers
• DVD: acess data stored on a dvd
• Keyboard entry:  data is inputed to the computer through a keyboard
• Keyboard: 1st input device
• Direct entry: requires data to be keyed
• Pointing devices: devices control the movement of the pointer (cursor)
• Mouse: most common pointing device
• Touch screen: sensitive to the touch
• Light pen: light sensitive
• Digitizer tablet: drawing tablet
• Scanning devices: read text and illustrations
• Voice input devices: audio input devices
• Input devices: accepts data and instructions fromthe user of from another computer system
• Output Devices: any piece of computer hardware that displays results after the computer has processed the input data that has been entered
• Computer display monitor: displays information in visual form
• CRT: cathode ray tubes
• CRT Monitor: type is display for use with desktop PCs
• LCD: liquid crystal display
• LCD Monitor: used in laptops
• LED: light emitting diode
• LED Monitor: lighting technology
• LCD Projectors: utilize two sheets of a polarizing with a liquid crystal solution between them
• Smart board: touch sensitive transparent touch panel
• Printer: prints text or illustration on paper
• Ink-jet/ Bubble-jet Printer: sprays ink
• LCD & LED Printer: uses liquid crystals or light emitting diodes
• Laser Printer: produce very high quality/ uses the same technology as copy machines
• Line Printer: uses a chain of characters or pins/ produce low quality
• Thermal Printer: an inexpensive printer that uses heat