Evolution of Digital Computers

Hi friends I will tell you about the evolution of computers, from Analog to Digital. I know you all knew it very well.

  • The evolution was started with the first counting device i.e ABACUS
  • Charles Babbage - the father of computers, made an engine called Analytical Engine, which has central processor, storage memory and input and out devices.
  • MARK - I was made by Professor Aiken, which was the first electro-mechanical computer.
  • Von Neumann gave the concept of "stored program computer" that can store the data and instructions at the same time and same place in the memory.
  • The first generation computers (1949 - 1955) used thermionic valves for their operations and used machine language to give instructions. Punch cards were used for input and output the data.
  • The second generation computers (1956 - 1965) used transistors for operations and high level language to give instructions. Magnetic tapes and disks were used to store data as secondary storage.
  • The third generation computer (1966 - 1975) used integrated circuits for operations, which is also known as IC.
  • The fourth generation computers (1976 - till now) are using VLSI circuits for operations and Microprocessor are used for programming and manipulations. VLSI - Very large scale integrated circuits.
  • The fifth generation computers will be based on Artificial Intelligence.
  • The computers are classified in analog, digital and hybrid categories:
    1. Digital computers convert data into binary numbers and then process it.
    2. Analog computers work with physical characteristics.
    3. Hybrid computers work with both digital and analog computers.
  • Digital computers are especial purpose computers depend on microprocessor.
  • Digital computers are divided into micro, mini, mainframe and super computers.
    1. Micro-computers has only single chip component called microprocessor.
    2. Mini-computer has large memory and its a multi-user system.
    3. Mainframe has been designed to handle large volume of data and information.
    4. Super-computer is the most powerful of all computers, designed to work fast.

Related Articles

Buying Guide: How To Select A Computer?

Which computing device are you planning to buy? The more than a half dozen of computers available in the market such as tablets, all in ones, desktop, note or ultrabook have turn the confusion worse compounded as to which one to buy and which not. Don’t make haste!. Know before buying which computer would suit you the best. Just read this article to have some inkling of the idea needed before zeroing on a computer.

Computer and Laptop Security Tips

In this resource we are going to have a discussion on the ideas and ways out to safeguard our System and Laptops. There are some additional powerful tips for the laptop security in the end. In order to have a clear cut idea that what is actually the difference between malware, spyware and other security threats, kindly have a look at the resource in detail.

Changing Power Options in Your Computer

Imagine a scenario wherein a user has to switch off the system temporarily, but he/she doesn’t even have the time to save the program/application on which he/she is working. If the user is aware of the various power options available with Windows, he will definitely use them during such scenarios. This article informs change the power options in the computer.

How To Buy A Computer Carefully?

This article gives complete information on buy a computer carefully considering various things. One can either buy an assembled or branded computer according to one's choice and suitability. It also explains about the details of computer accessories like the processor, mother board, ram, hard disk, video writer, monitor, smps etc along with their price for better understand ability of the readers.

How To Prepare Your Old Computer Before Selling

Learn prepare your old computer before selling, this article provides you the most important factors to consider before you sell your old computer unit. Read the rest of this article for your additional knowledge before you sell an old personal computer.

More articles: Computer


  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name: