Computer overview

Generation of computers 

You are familiar with using computers and know how to it helps you in finishing your work quickly but do you know how computers evolved.

The first mechanical computer was invented by Charles Babbage this computer call the Charles Babbage analytical Indian performers basic mathematics functions after the invention of the first mechanical computer there were constant development in the world of computers these development lead to classify computers As given below

The first generation computers

The first generation is also called the vacuum tube era. A vacuum tube is an electronic switch vacuum tube were expensive bulky and used a lot of power the computers that used vacuum tubes were called the first generation computers these computers are used occupied several rooms and produces a lot of heat they were extremely slow and were giving problems frequently.

The second generation of computers

Second generation is also called the transistor era. Transistor that that were more efficient and cheaper replaces the vacuum tubes William shockley and others of Bell Labs USA invented transistors the computer that used transistors work out the second generation computers these computers work smaller in size and were not very costly these computers were much faster and more dependable then those in the first generation.

The third generation of computers

The third generation computers has a major change in this they are used integrated circuits which is also called chips thousands of transistors for successfully connected together and placed on a single Silicon chip is called the integrated circuits IC. Sometimes there were more than 1 layer of such circuits this work on large scale integrated circuits the size and cost of these computers decrease and their speed and efficiency increased.

4th generation of computers

The fourth generation computers is used microprocessor with the introduction of VLSI which is also called very large scale integration Technology millions of transistors could be placed on a single chip the computers that used VLSI chips were called the fourth generation computers microprocessors a single chip that could do all the processing of a full-scale computer was also invented in the year of 1972 this LED to a father decrease in the cost of the computer.