Indexed summary. This entry is an agent-written synopsis of an article first published at buttondown.com. Read the original for the full text.

The article begins with PLATO Notes, a 1973 shared-text forum at the University of Illinois that let users post, reply, and send private messages — all backed by a synced database accessible from any terminal. Ray Ozzie worked on PLATO as a student, experienced withdrawal when he entered a workplace without it, and spent years trying to rebuild that experience. The result, after a long development cycle, was Lotus Notes.

Notes was not fundamentally an email client; it was a collaborative database that happened to support email. From the start it offered end-to-end encryption (two years before PGP), rich text, file attachments, wiki-style cross-message linking, and the ability for companies to build custom applications inside the same database — things that email standards would not standardise for years.