Though of dubious utility, some intrepid hackers have managed to pare a working, fully-functional (well, mostly) Windows 95 installation down to fewer than 5 MB (mirror). Though it lacks support for sound or a TCP/IP stack, it’s still an impressive proof-of-concept. Apparently a project is in the works to add those features back in, and other, similar projects with Windows NT, 2000, and Office, as well as a version of Windows 98 that’s bootable from a CD are in the works. The original site was Slashdotted most swiftly.
I just want to know how fast it boots.