thearchivist.funPackets make shared networks practical
Donald Davies and colleagues at NPL developed packet switching as a way to share data networks.
Context and provenance
The National Physical Laboratory dates Donald Davies and his team's development of packet switching to 1965. Instead of treating a message as an indivisible object requiring a continuously reserved connection, the approach divides information into smaller packets. A receiving system reassembles those pieces. This makes communication infrastructure useful to multiple exchanges and accommodates the uneven bursts characteristic of computer activity. Davies worked within a wider international history of networking research, so this milestone should not be mistaken for a claim that one laboratory invented every part of the internet. Its importance lies in a specific design principle that became fundamental to digital communication.
Why it matters
Editorial perspective: The packet is an example of invisible cooperation. What feels like one continuous conversation depends on small units sharing a larger system, suggesting how technical rules can make collective resources more flexible.