This dictionary contains terms used in all fields of electronics -- including radio, television, sound systems, comunications, industrial electronics, computers, automation, Lasers, etc.
I really like this book! Not only definitions that helped me understand terms, but also pictures! It doesn't really limit itself to electronics and computers, but touches on all kinds of technical terms that may be vaguely related, like a hydrometer for testing batteries. A great book and a great look at the early days of all things electronic.