The Internet has turned 40 years old this week, with its beginnings occurring at 9pm on October 29th, 1969. On that day, engineers at the University of California Los Angeles (UCLA) and Stanford Research Institute (SRI) nearly 400 miles away sent data over the first two nodes. Back then, the Internet was known as Arpanet, after the US Department of Defense's Advanced Research Projects Agency (ARPA), which commissioned its creation.