July 2nd, 1999, when most PCs have about 64M RAM:

From:  http://www.cnn.com/TECH/computing/9906/29/win2k.ent.idg/

Engineers at The Tolly Group have launched the Windows 2000 Beta
3 along with Internet Explorer, Microsoft Word and Microsoft
Outlook, all of which use a combined total of 94M bytes of memory.
Windows 2000 is comprised of almost 40 million lines of code and
itself takes up about 50M bytes of memory when it loads. If you
unleash that behemoth on a server with only 64M bytes, you'll
exhaust your server by just requiring it to swap data back and
forth to disk. 


Dave says:

Jiminy Crickets.

I didn't realize that OSes were supposed to grow with Moore's law.  :)

I have a whole new bundling opportunity idea for M$ if they are listening.
They are driving much of the H/W market, so they should start 
bundling RAM with Win!  Think of it:  Win2k with 64M, Win2k with 128M
for 'power-users' who want to run two applications, etc!  Isn't it an
exciting time to invest in RAM stock?

*grin*