Here's a list of the abbreviations I use throughout this site. I don't use page numbers since various editions have different pagination, but I do include chapter numbers whenever possible. SS3, then, refers to the third chapter of Harry Potter and the Sorcerer's Stone.

If you want more information about these sources, visit the "Sources of Lexicon Information" page.

The Harry Potter books by J. K. Rowling:
SS - Harry Potter and the Sorcerer's Stone
PS - Harry Potter and the Philosopher's Stone
CS - Harry Potter and the Chamber of Secrets
PA - Harry Potter and the Prizoner of Azkaban
GF - Harry Potter and the Goblet of Fire
OP - Harry Potter and the Order of the Phoenix
FB - Fantastic Beasts and Where to Find Them
QA - Quidditch Through the Ages

Other sources:
Sch1 - interview with JKR on Scholastic.com, February 2000
Sch2 - interview with JKR on Scholastic.com, October 2000
CR - interview on the Comic Relief website
BP - interview on the Blue Peter television show
SN - interview with the Southwest News
Nr - interview with Newsround
NR2 - interview with Newsround September 19, 2002
HPM - "Harry Potter and Me" BBC December, 2001
NPC - Q&A at the National Press Club, October 20, 1999
RC - interview with Raincoast Books March 2001
TCG - Harry Potter Trading Card Game
SS/f - filmed version of the first book
CS/f - filmed version of the second book
BN - interview with Barnes and Noble.com
CS/g, SS/g - the video games, the information for which was created by Rowling
fw# - Famous Wizard card by number; these cards appear in more than one video game

Other abbreviations:
JKR - J. K. Rowling
HPfGU - Harry Potter for Grown Ups (you might find this abbreviated as HP4GU here and there too)
FAQ - Frequently Asked Questions

standard indexing abbreviations:
c.f. - compare with
e.g. - for example
i.e. - in other words
c. - circa (around the date given)
esp. - especially
ff. - and following
q.v. - see...