Information Management: A Proposal
He married hypertext to the internet and gave every document an address: the World Wide Web.
In 1989 a quiet proposal at a physics lab asked for something modest, and accidentally described the medium most of the world now lives in.
The big idea
Tim Berners-Lee worked at CERN, the giant particle-physics laboratory near Geneva. So much went on there, by so many people, changing so fast, that the place kept losing track of its own knowledge — who knew what, where a thing was written down. The filing systems of the day were too rigid: a strict tree put every document in one drawer, and keyword lists failed because no two people label a thing the same way.
His answer was a different shape for information. Instead of a tree, make a web: let any document carry links to any other document, on any computer, with no central authority deciding what may connect to what. To read, you follow links. That web of linked documents is what we now call the World Wide Web.
Where it came from
Berners-Lee had built a small private program at CERN back in 1980, called ENQUIRE, that let him link notes about people and projects — a hint of the idea. In March 1989 he wrote it up properly as 'Information Management: A Proposal.' His manager, Mike Sendall, scrawled 'Vague but exciting…' across the top and, crucially, gave him room to try.
With a colleague, Robert Cailliau, he reworked the proposal in 1990 and started building: the first browser and the first web server, on a sleek black NeXT computer. The first web page went online in 1991. Then, in 1993, CERN did the decisive thing — it gave the Web away, free for anyone to use and build on. That openness is why it spread across the whole world instead of staying one lab's tool.
Why it mattered
The Web won not because it was the richest design — others had grander ideas — but because it was simple and open. Anyone could put up a page; anyone could link to anyone; no permission, no licence, no fee. That low bar let millions of people add to it, and a thing everyone can add to grows faster than anything one company controls. Within a decade it had become the ordinary way humanity publishes and reads.
An analogy
Think of the internet as the road and postal network: wires, and an address for every building (every computer). On its own that just moves parcels between machines. The Web is the postal service running on top — one shared way to address a 'letter' (a page), have it fetched no matter whose building it sits in, and tuck inside it pointers to other letters anywhere. Berners-Lee didn't lay the roads (that was the internet, from Cerf and Kahn in 1974); he invented the letters and the links. Try following some links yourself below.
Where it sits
The Web stands on two earlier ideas in this Library. Vannevar Bush (1945) first imagined the link — tying any two documents together and following the trail — and Ted Nelson named it 'hypertext.' And it rides on the internet built by Cerf and Kahn (1974), which gave every machine an address and a way to pass packets. Berners-Lee joined those two — the link and the network — into one simple, open system. The link graph he created later fed the search engines that rank it, and the AI language models trained on the text it holds. He has also warned that the open Web drifted toward a few giant platforms, and has worked to push it back toward its decentralised roots.
This proposal concerns the management of general information about accelerators and experiments at CERN. It discusses the problems of loss of information about complex evolving systems and derives a solution based on a distributed hypertext system.
If a CERN experiment were a static once-only development, all the information could be written in a big book. As it is, CERN is constantly changing as new ideas are produced, as new technology becomes available, and in order to get around unforeseen technical problems.
A 'web' of notes with links (like references) between them is far more useful than a fixed hierarchical system.