Elf Hello World
My favourite page on ELF executables of all time: <a href="http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html" rel="nofollow">http://www.muppetlabs.com/~breadbox/software/tiny/teensy.htm...</a>, "A Whirlwind Tutorial on Creating Really Teensy ELF Executables for Linux (or, 'Size Is Everything')"