Celcom is the first mobile telecommunications company in Malaysia and also a member of the TM group of companies. Celcom successfully introduced mobile telephony in Malaysia through its ART-900 service, using first generation NMT-900 technology. Celcom upgraded to the GSM900 service as the cellular phone... 

Elisha Gray and Enos N. Barton started a small manufacturing firm Western Electric in 1869. Firstly Based in Cleveland, Ohio, in 1880, the company had relocated to Chicago, Illinois and become the largest electrical manufacturing company in the U.S. The American Bell Telephone Company which is founded...