The ARRL handbook for the radio amateur

NOTE: The title has undergone a revision (as has happened often in the past), the new title is: The "ARRL Handbook for Radio Communications".

Published annually since 1926, as the American Radio Relay League's (ARRL) flagship annual publication, , the "ARRL Handbook for Radio Communications" is one of the most respected and useful reference work for many Hams providing wide variety of information, such as:

Introduction
What is Amateur (Ham) Radio?
Fundamental Theory
Electrical Fundamentals
Analog Basics
Digital Basics
Practical Design & Principles
RF Techniques
Computer-Aided Circuit Design
Power Supplies
Modulation
Oscillators & Synthesizers
Mixers, Modulators & Demodulators
RF & AF Filters
Receivers
Transmitters
Transceivers
DSP & Software Radio Design
Digital Modes
RF Power Amplifiers
Repeaters
Antenna Systems & Radio Propagation
Propagation of Radio Signals
Transmission Lines
Antennas
Equipment Construction & Maintenance
Component Data & References
Construction Techniques
Station Accessories
Test Equipment & Measurements
Troubleshooting & Maintenance
RF Interference
Station Assembly & Management
Safety
Assembling a Station

Many Hams would feel their 'Shacks' were incomplete without at least one year's version in the library.

Recently, the ARRL has been including a CD with the handbook, so the entire book can be downloaded to PC, MAC, etc., and viewed, searched, printed, etc., as needed.