In 1992, Microsoft announced Windows 3.1.
Windows 3.1 required a minimum of a 286 PC with 1MB of RAM to run. Windows 3.1 was the first version of Windows to be distributed on CD-ROM in addition to 720k, 1.2MB, and 1.44 MB floppy distributions. Installed size on the hard disk was between 10 and 15MB.
Learn more at http://en.wikipedia.org/wiki/Windows_3.1x
In 1938, Teflon was invented by Roy J. Plunkett.
BPTFE or polytetrafluoroethylene was discovered in 1938 by Dr. Roy Plunkett at the DuPont research laboratories. PTFE was first marketed under the DuPont Teflon trademark in 1945. BPTFE has a coefficient of friction against polished steel of 0.05 to 0.1, which is one of the lowest for any solid that has been measured.
Learn more at http://www.wisegeek.com/what-is-teflon.htm