Apple 1996 and 1997 WWDC.
The WWDC1996 CD contains information about the AIX-based Apple Network Servers. It also contains information about the Apple Pippin set top boxes.
The WWDC1997 CD contains information about Rhapsody (the time when Apple bought NeXT and starting to develop OPENSTEP into OS X).
There's an extra promotional CD about web development (WebObjects) when Apple bought NeXT.
http://picasaweb.google.com/simplepractices/FSLowEndMac#5265174254081140994http://picasaweb.google.com/simplepractices/FSLowEndMac#5265174253557782082http://picasaweb.google.com/simplepractices/FSLowEndMac#5265174260155062930Selling all three for $25 shipped to the lower 48.