Also see The Science of Color in the Did You Know . . . ? section of Webopedia.

GlobalSpec.com: Cathode Ray Tubes - Provides database of suppliers for cathode ray tubes. Includes catalogs, technical information, and supplier contact information.

Anatomy and Operation of a CRT Monitor 
Outlines the anatomy and operation of a CRT monitor, including the various shadow mask designs and associated safety standards. Includes graphics, diagrams and an integrated glossary. This page is from "The PC Technology Guide."

Comparison of LCD to typical CRT monitors
A comparison between flat LCD and traditional CRT monitors, including display sizes, physical size, display charactersitics, and energy features.

CRT Characteristics
Describes analog and Digital CRTs, dot pitch, shadow mask and aperture grill, image quality factors, and magnetization and degaussing. This page is from "The PC Guide."

PC Guide's monitor reference
Comprehensive guide to the operation of the monitor. Covers construction and operation, resolution, color, refresh, size and size matching, CRT characteristics, and power and safety issues.

How Monitors Work
Everything from the electron gun to the differences between a shadow mask and an aperture grill. It's basically everything that you've always wanted to know about monitors but were terrified to ask.