Computer History

Generations of Computers

1st generation

The first generator of computers was made in 1822 by Charles Babbage.

In 1837, Charles Babbage proposed the first general mechanical computer( The Analytical Engine).

2nd generation

The transistor was invented in 1947 but did not see widespread use in computers until the late 1950s.Transistors replaced vacuum tubes and ushered in the second generation of computers. Second-generation computers still relied on punched cards for input and printouts for output.

3rd generation

Instead of punched cards and printouts, users interacted with third generation computers through keyboards and monitors and interfaced with an operating system, which allowed the device to run many different applications at one time with a central program that monitored the memory.

Alan Turing

Alan Mathison Turing, (23 June 1912 – 7 June 1954) was a British pioneering Computer scientist, mathematician, logician, cryptanalyst and theoretical biologist. He was highly influential in the development of computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general purpose computer. Turing is widely considered to be the father of theoretical computer science and artificial intelligence.
Sir Timothy John 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. He made a proposal for an information management system in March 1989, and he implemented the first successful communication between a Hypertext Transfer Protocol (HTTP) client and server via the Internet sometime around mid-November of that same year.

4th generaton

In this generation, there were developments of large-scale integration or (1000 devices per chip) and very large-scale integration or VLSI (10000 devices per chip). These developments enabled the entire processor to fit into a single chip and in fact, for simple systems, the entire computer with processor; main memory and I/O controllers could fit on a single chip.