It was developed by American research scientists at Bell Laboratories in 1947 who won a Nobel prize for their work. The transistor was a more efficient smaller amplifier than the vacuum valve it replaced. It wasn't until 1954 that American firm Texas Instruments began to sell transistors to a company called IDEA which used them to make portable radios. The wireless network became a reality for Apple computers with the introduction of a device called AirPort. So you can send and receive data, access the Internet and printers, without worrying where the nearest network connection point is.
Radio frequencies can pass through solid objects such as walls.
This enables you to send and receive data from any desk in your classroom or any room in your school. Inc. All rights reserved.