Ya Sapna,the answer is...

Bluetooth is a method for datacommunication that uses short-range radiolinks to replace cables between computers and their connected units. Many companies have been mulling over this idea, but it was Ericsson Mobile Communication that finally (in 1994) started the project that was named Bluetooth.

As computerized implementations have grown and become increasingly more common in our environment, there has also been a growing need for cables of varying kinds, to tie all these units together and ensure communication between them. These cables, when they grow into a multitude, are not only unsightly but also increasingly cumbersome to handle, both directly and (even more so) indirectly.