Java Virtual Machine
<language, architecture> (JVM) A specification for software which interprets Java
programs that have been compiled into byte-codes, and usually stored in a ".class" file.
The JVM instruction set
-oriented, with variable instruction length.
Unlike some other instruction sets, the JVM's supports object-oriented
programming directly by including instructions for object method
invocation (similar to subroutine
call in other instruction sets).
The JVM itself is written in C
and so can be ported to run on most platforms.
It needs thread
support and I/O
(for dynamic class loading).
The Java byte-code is independent of the platform.
There are also some hardware implementations of the JVM.
Sun's Java chip (http://news.com/News/Item/0,4,9328,00.html).