Digital Signal Processing Technology -- Essentials of the Communications Revolution. An understandable presentation and reference on DSP in contemporary communications technology.

The ARRL Digital Technology for Emergency Communications Course -- Now Shipping! -- CD-ROM. Learn all the ways to use digital technology as an emergency communications tool!

The ARRL Software Library for Hams 3.0 -- Now Shipping! -- CD-ROM, Version 3.0. Quick access to utilities, applications and information.

ARRL's VHF Digital Handbook -- Dive into the digital radio universe!

ARRL's HF Digital Handbook -- Join the Digital Race! 4th Edition.