History of Computing

All you need to know about Computing

Input Devices

An input device is a piece of a hardware equipment use to control signals or to provide data to a processing system such as a monitor or other information appliance.

Output Device

An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system.

What's inside a computer?

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Network Card

Network Card is usually installed to a computer. It provides the computer with networks that are connected to the computer. It connects the computer with a computer network usually a LAN.

What's a Binary Code ?

A Binary Code is the code that the computer only understands. A Binary Code only involves to different types of codes which is 0,1. Computers don't understand any other code than that.

Example- 01000 00101 01100 01100 01111 (This says 'Hello')

Alan Turing

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Alan Turing is a computer scientist who works for the country. He is mathematician and logician. During WW2 he tries to crack the enemies code. He also made a machine that was able to help him crack the code. After he cracked the code the Germans stopped the war. It is estimated that he has shortened the war by two to four years.
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About Networks

A computer or data network is a communication between computers which allows computer to share data. The connections are established by using a wired media or a wireless media. They share a data by using data link.

What do you need to make a computer network?

  • Router/Wireless access point
  • Wireless Print server
  • Modem
  • Computers
  • Switch
  • Internet

Types of Network

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Ring Network

Advantage - There is no possible way of data collisions and also the transmission of data is simple.

Disadvantage - If one cable breaks the whole network gets affected. The setup of the ring network is expensive

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Bus Network

Advantage - It's easy to setup and add new devices. It's cheap to install, as it doesn't require much cable.

Disadvantage - Data collisions can occur easily and there is low security as a broadcast network.

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Star Network

Advantage - There are less chance of data collisions. The data goes straight from sender to receiver not broadcast.

Disadvantage - It requires too many cabling which is very expensive and all of the computer are connected to the hub/switch which means if it have problems the whole thing gets affected.