People's Chronology
Subject listing of events for ranges of years from 3 million B.C. to the 10th century A.D. and for each year from the 11th century through 2004. (3rd. ed., 2005, Gale Virtual Reference Library)
Pocket Fowler's Modern English Usage
Based on Burchfield's New Fowler's Modern English Usage, this covers grammar, syntax, style, word choice, and advice on usage. (1999, Oxford Reference Online)
Political Parties of the World
Details about all currently active parties of any consequence, as well as overviews of national parliamentary and constitutional arrangements for every country in the world. (6th ed., 2005, Gale Virtual Reference Library)
Pragmatic Circuits: Frequency Domain
A 50- to 100-page document that introduces an important topic in engineering or computer science. (Synthesis Digital Library, Morgan and Claypool)
Pragmatic Logic
A 50- to 100-page document that introduces an important topic in engineering or computer science. (Synthesis Digital Library, Morgan and Claypool)
Project Gutenberg
Project Gutenberg is the first and largest single collection of free electronic books, or eBooks. It is a volunteer effort, and everyone is welcome to contribute.
PSpice for Digital Signal Processing
A 50- to 100-page document that introduces an important topic in engineering or computer science. (Synthesis Digital Library, Morgan and Claypool)