The Domesday Project was an immensely ambitious project, that would create a contemporary, multimedia version of the 11th century Domesday Book, accessible via Acorn's BBC micros and laserdiscs. Shockingly, the 1984-86 project more or less succeeded in its lofty goals and came up both with the needed hardware and two discs (the Community Disc and the National Disc) filled with census data and personal accounts of the mid-80s. You can find out more about the BBC Domesday Project over at Wikipedia.
What's more, you can now actually own a complete Domesday System and either start a computer museum or deeply impress your friends. You can start by grabbing the main system (a SCSI enabled BBC Master with trackball), the laser-disc drive (Philips' LV-ROM), the monitor, the system discs (with some extras) and and the BBC Countryside LV-ROM. All those links do of course lead to eBay auctions (by the same seller) and the items can be shipped to Europe, United States, Australia and Canada.