ROM: read only memory is used to be read. It job in the computer is start it up because it is the same every time.

RAM: Random access memory is used to store information but then it retrieves the information when it needs it again .

CPU: Central processing unit is a section of the computer that carries instructions of a computer program

Motherboard:  The motherboard holds many of the crucial components of the system

Keyboard: The keyboard typically has characters engravedor printed on the keys and each press of a key typically corresponds to a single written symbol.

Mouse: The mouse's motion typically translates into the motion of a cursor on a display.

Display monitor: A monitor or display is an electronic visual display for computers.

Disk drive:

Printer: a printer is a peripheral which produces a text or graphics of documents stored in electronic form, usually on physical print media such as paper or transparencies.

Digital camera: a digital camera is a camera that takes videoor still photographs, or both, digitally by recording images via an electronic image sensor.

Scanner: A scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to adigital image.

Modem:

WiFi: A Wi-Fi enabled device such as a personal computer, video game console, Smartphone, or digital audio player can connect to the Internet when within range of a wireless network connected to the Internet.