[REQUEST] Java for DOS -- Sun JavaPC (JavaPC Engine)
In 1998 Sun released an official Java Virtual Machine (JVM) for DOS in their JavaPC Engine product. Unlike Sun's JRE and JDK products which were freely available on multiple platforms, this was a commercial-only product. It was later renamed to just JavaPC, ultimately wasn't very successful, and was discontinued after a fairly short time.
If anyone can contribute a copy of JavaPC that would be quite fascinating. The only other JVM for DOS was KaffePC. KaffePC is a port of an early version of Kaffe (an unofficial JVM), and it's basically an incomplete Java 1.1 VM that is lacking key features including applet, AWT, and security API support. The JavaPC product supports all of those features.
Some links to the Wayback Machine for additional info: