Computer Fourth Generation

1) Computer Fifth Genaration 

2) Computer Third Genaration

3) Computer Second Genaration 


4) Computer First Genaration

The fourth generation computers possess still greater input/output, storage, and processing capabilities. In the fourth generation computers, semiconductor storage processing capabilities. In the fourth generation computers, semiconductor storage devices were introduced. In the early 1970s IBM introduced the concept of virtual storage into their 5000 and 370 series of computers.



Machines previously limited to a maximum internal storage capability of approximately one million characters now possessed a virtual storage capability in billions and trillions of characters. With this capability a machine could execute a program many times the size of the machines actual memory. Microcomputers using microprocessors as the CPU proliferated in the fourth generation.

Now a days, the compact disk (CD) promises to become the data storage medium of choice. A compact disk read only memory (CD-ROM) is encoded with on and off bits. Bits are stored on the disks (3.5 inch diameter inch diameter) aluminum surface as tiny sits at varying depths. The average CD can store about 4,800 million bits or 600 million characters of data. This is approximately a quarter of a million pages of text.




The most impressive advancement has occurred in software. As a result of these changes, access to substantial computer power, previously only affordable by very large business concerns, is now economically feasible for small business and personal applications. Personal computers are examples of fourth generation microcomputers.