PAIP, SICP -- seems like if a book has a acronym, then it must be great. Can't come up with more examples though.
Edit:
CLTL2: Common Lisp the Language
CLRS: Introduction to Algorithms, referred to by the authors’ initials
CSP: Communicating Sequential Processes
EOPL: Essentials of Programming Languages
The CSP abbreviation I gave is also a bit of a stretch. Most people who use it probably mean it for the concepts, not the book itself.
TESL - The Elements of Statistical Learning
GoF - Design Patterns: Elements of Reusable Object-Oriented Software
PGM - Probabilistic Graphical Models
SL - Subjective Logic
OL - Optimal Learning
I'd enjoy knowing if anyone else has run across these, and what they might think.
AIMA - Artificial Intelligence: A Modern Approach