HAKMEM, alternatively known as AI Memo 239, is a 1972 "memo" (technical report) of the MIT AI Lab that describes a wide variety of hacks, primarily useful and clever algorithms for mathematical computation. There are also some schematic diagrams for hardware. Contributors included about two dozen members and associates of the AI Lab.

HAKMEM is notable as an early compendium of algorithmic technique, particularly for its practical bent, and as an illustration of the catholic interest of AI Lab people of the time.

HAKMEM contains some original work in many fields, notably continued fractions.

http://en.wikipedia.org/wiki/HAKMEM