If you want to get technical, it was in the 1940s. it was the size of a small house. see http://en.wikipedia.org/wiki/ENIAC if you are thinking computers roughly the size you see them today, the answer could be argued between the 70s 80s and 90s. in the 70s you had the Xerox Alto, in the 80s you have the Macintosh and the IBM PS/2, 90s is when you start seeing more modern things though.
Earlier computers.
Yes, the computer as we know it today is a modern invention. The first electronic digital computer was developed in the mid-20th century and has since evolved significantly to become an integral part of modern society.
Charles Babbage developed 1st computer in 1886.
a computer developed in about 5,000 years ago in china.
IBM developed the first home computer
You might be thinking of Blaise Pascal. He had a computer language named after him.
Networks were developed as a communication method between computers at remote sites
The computer was developed or created in the mid 1820s. This was done by Charles Babbage who proposed the first mechanical computer in 1837.
Colossus was a very large computer that used valves - a far cry from a modern desktop computer. It was used to help break the German's Enigma Code.
Akash tablet computer
Computers have evolved through the years from simple, room-sized calculators to machines capable of trillions of computations every second. Along with shrinking equipment size, computers have exponentially increased in computing power.
The company that developed the Watson computer is IBM. Watson is a computer system with artificial intelligence, that can answer questions, if asked in a natural language.