http://en.wikipedia.org/wiki/The_Unix_Programming_Environment http://en.wikipedia.org/wiki/The_C_Programming_Language_(book) http://www.nongnu.org/avr-libc/user-manual/index.html http://www.avrfreaks.net/wiki/index.php/Documentation:AVR_GCC http://tom-itx.dyndns.org:81/~webpage/how_to/atmega168/mega168_howto_main_index.php