Assembly
- Christopher Browne's assembly language resources
- Mac OS X Assembler Guide (Covers PowerPC instruction set/more)
- slide preso with a really basic assembly/etc intro (also explains gcc toolset/gas/etc)
- Gene Davis's Real Geeks Assemble: Beginning Assembly Language (on PPC) ** chapter 1 ** chapter 2
- VM Instruction set (itself an assembler language basically)
- JVM Instruction Set from Compiling Pascal to Java