Computer Components

Learning About Computer Parts

Motherboard

A motherboard is one of the most essential parts of a computer system. The motherboard is a sheet of plastic that holds all the circuitry to connect the various components of a computer system. It holds together many of the crucial components of a computer, including the central processing unit (CPU), memory and connectors for input and output devices.

CPU

The central processing unit (CPU) is the brain of your computer. It handles all the instructions you give your computer, and the faster it does this, the better. The central processing unit (CPU) of a computer is a piece of hardware that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system. The CPU is like the brains of the computer - every instruction, no matter how simple, has to go through the CPU.

RAM

Random-access memory (RAM) is a type of computer data storage. A RAM device makes is possible to access data in random order, which makes it very fast to find a specific piece of information. RAM devices are used in computer systems as the main memory. RAM is considered volatile memory, which means that the stored information is lost when there is no power. So RAM is used by the central processing unit (CPU) when a computer is running to store information that needs to be used very quickly, but it does not store any information permanently.

Hard Drive/ disk

The hard drive of a computer is a device that stores all the software installed on a computer as well as all the data files created and used by this software. This includes any documents you have created and downloaded, such as photos and music.

Optical drive

An optical drive in a computer system allows you to use CDs, DVDs, and Blu-ray discs to listen to music or watch a movie. Most drives also allow you to write data to a disc, so you can create your own music CDs or create of back-up copy of important data.

Moniter

A computer monitor is a display adapter that displays information processed by the computer's video card. When a video card or graphics card converts binary information from 1s and 0s into images, these images are displayed onto the directly connected monitor. There are different types of monitors, including cathode ray tube (CRT) and liquid crystal displays (LCD). Monitors have display functions that include powering it on and off, controlling brightness, contrast and position, among others.

inputs

An input device for a computer allows you to enter information. The most fundamental pieces of information are keystrokes on a keyboard and clicks with a mouse. These two input devices are essential for you to interact with your computer. Many other input devices exist for entering other types of information, such as images, audio and video. Input devices represent one type of computer peripheral - the other two types are output devices and storage devices.


Following are few of the important input devices which are used in a computer:

  • Keyboard
  • Mouse
  • Joy Stick
  • Light pen
  • Track Ball
  • Scanner
  • Graphic Tablet
  • Microphone
  • Magnetic Ink Card Reader(MICR)
  • Optical Character Reader(OCR)
  • Bar Code Reader
  • Optical Mark Reader(OMR)

outputs

Any information that has been processed by and sent out from a computer or similar device is considered output. A simple example of output is anything you view on your computer monitor. The bottom half of the image shows data being sent from the computer to a printer. That data is then printed onto a piece of paper; both are forms of output.


Following are few of the important output devices which are used in a computer:

OUTPUT DEVICES:

  • MonitorPrinters (all types)
  • Plotters
  • Projector
  • LCD Projection Panels
  • Computer Output Microfilm (COM)
  • Speaker(s)

Tim Berners-Lee, the Inventor of the World Wide Web

Sir Timothy John "Tim" Berners-Lee, (born 8 June 1955), also known as "TimBL", is an English computer scientist, best known as the inventor of the World Wide Web.

Sir Tim Berners-Lee invented the World Wide Web in 1989 while working as a software engineer at CERN, the large particle physics laboratory near Geneva, Switzerland.

Alan Turing

Alan Turing was an English mathematician, wartime code-breaker and pioneer of computer science.

In 1936, Turing went to Princeton University in America, returning to England in 1938. He began to work secretly part-time for the British cryptanalytic department, the Government Code and Cypher School. On the outbreak of war he took up full-time work at its headquarters, Bletchley Park.

Here he played a vital role in deciphering the messages encrypted by the German Enigma machine, which provided vital intelligence for the Allies. He took the lead in a team that designed a machine known as a bombe that successfully decoded German messages. He became a well-known and rather eccentric figure at Bletchley.