This CD-ROM contains two extensively illustrated interactive glossaries: one with more than 1,900 specific scientific terms and definitions used in connection with this enormous group of organisms, and one with more than 1,300 taxon names and descriptions. Hyperlinking of the texts allows easy point-and-klick navigation within the glossaries. The built-in quiz, which tests the user's knowledge, makes this CD-ROM, with hundreds of highly detailed illustrations and a quick-time movie showing major historical protoctist researchers, a perfect teaching tool.