SharePoint evolved from projects codenamed "Office Server" and "Tahoe" during the Office XP development cycle.
"Office Server" evolved out of the FrontPage and Office Server Extensions and "Team Pages". It targeted simple, bottom-up collaboration.
"Tahoe", built on shared technology with Exchange and the “Digital Dashboard”, targeted top-down portals, search and document management. The searching and indexing capabilities of SharePoint came from the "Tahoe" feature set. The search and indexing features were a combination of the index and crawling features from the Microsoft Site Server fa…