ARPANET Goes Live

The first message, 'LO', was sent from UCLA to SRI, marking the birth of packet-switched networking. The system would expand to four nodes by December of that year.

Significance

This event was the foundational step for all modern computer networking, demonstrating the viability of distributed packet-switched communication, a prerequisite for distributed applications.

Key facts

Date
1969-10-29
Type
milestone
Location
UCLA, Stanford Research Institute, UC Santa Barbara, University of Utah