Cambridge University researchers invented the world's first webcam in 1991 for the sole purpose of monitoring a coffee pot in the Trojan Room computer lab.

A coffee pot became a networking problem

In the University of Cambridge’s Trojan Room, the coffee machine sat away from many researchers’ desks. Before making the trip, someone might find the pot empty. The webcam’s original job was practical: let people check whether coffee was available without leaving their workstations.

A camera pointed at the pot and fed images to a computer. Software periodically captured a still frame and made it available over the lab’s local computer network—the system connecting machines within the building. Because the image refreshed only every few seconds and showed no sound or motion, this was not live video in the modern sense. It was a shared, repeatedly updated snapshot.

From lab convenience to a web landmark

The setup made a small but revealing use of networked computing: a sensor in one room could provide useful information to people elsewhere. Its low-resolution grayscale pictures were enough for the task. Viewers only needed to see whether the pot looked full, not inspect fine detail.

When the image was later made accessible on the World Wide Web, people outside Cambridge could view it too. That change turned an in-house convenience into a public curiosity—and helped make the coffee pot a memorable early example of a camera sharing images online. The underlying idea was simple: capture a scene, send the image across a network, and let distant users check it on demand.