The first link went live on October 29, 1969, between a computer at UCLA and one at the Stanford Research Institute, some four hundred miles apart. A student typed the word "login," but the system crashed after the first two letters, so the message that day was just "lo." The bug was fixed. The full word came the next day.
The project was military in seed. The U.S. Defense Department funded ARPA to build a net that could route around damage, unlike the single line that a cut would break, and the design let many machines share one web of links that could heal itself when a node went dark. The plan was tough. The phone network carried the load.
The knot grew. More sites joined through the 1970s, and the rules that let different computers speak, the TCP and IP protocols, were written and spread. Email came early, then files, then the web decades later. The protocols let any machine join. The scale exploded. Campuses joined the web by the dozen.
The net left the lab and reached the home, and the message of 1969 looks like the first word of a new tongue. The internet now carries the world's talk and trade. It began with a broken 'lo'. The seed was small. The tree is vast. The first link was a humble wire.