Understanding Signals -- Now Shipping! -- This Stamps in Class guide shows you how to generate, view and measure a variety of wave forms with the Parallax USB Oscilloscope and BASIC Stamp-controlled circuits.

The ARRL Instructor's Manual for Technician and General License Courses -- Now Shipping! -- NOW designed for both Technician and General Class. Includes CD-ROM.

Parallax USB Oscilloscope -- Now Shipping! -- This portable two-channel digital storage oscilloscope is a handy and affordable tool for both hobbyist and student!

What's a Microcontroller? Parts Kit and Text -- Now Shipping! -- Incorporates a variety of fun and engaging experiments using motion, light, and sound.

Getting Started with Ham Radio -- Get on the air now! A guide to your first Amateur Radio station.