"The is a global system of interconnected computer networks that is used by billions of people worldwide. In the 1960s, a team of computer scientists working for the U.S. Defense Department's (Advanced Research Projects Agency) built a communications network to connect the computers in the agency, called , the predecessor of the internet. It used a method of data transmission called "", developed by computer scientist and team member , based on prior work of other computer scientists. This technology was progressed in the 1970s by scientists and , who developed the crucial communication protocols for the internet, the (TCP) and the (IP), according to computer scientist in his book “Ideas That Created the Future: Classic Papers of Computer Science” (, 2021). For this, Kahn and Cerf are often credited as "inventors of the internet”."