AMOP is an acronym used in reference to the lisp book, The Art of the Metaobject Protocol, by Gregor Kiczales, and which was published by MIT Press, 1991.

AMOP chapters 5 and 6 -- respectively, MOP Concepts and MOP Generic Functions and Methods Dictionary -- are available here, online, courtesy of the ALU

Scanned version on Google books.

Also see: MOP, CLOS