A Brief History of Time is one of the best CD-ROMs I've ever come across, no less because it is based on Stephen Hawking's groundbreaking book of the same name.

Easily the best astronomy software ever until its later versions and Maris' Redshift 3, Dance of the Planets was recommended by my astronomy professor.

One of the best and most original edutainment titles ever made, Designasaurus II is the superior sequel to Britannica's Designasaurus, the unique "dinosaur sim" for the Commodore 64.

One of the most original "business" games ever made, DinoPark Tycoon is a great concoction of education and strategy.

Dinosaur Adventure is a fun edutainment title from Knowledge Adventure, third in its ?Adventure? series.

Discover Space is an excellent desktop planetary program from Broderbund, makers of numerous prize-winning edutainment titles including the world-famous Where in [X] is Carmen Sandiego? series.

Discoveries of The Deep is an okay simulation of deep-sea exploration that suffers from the same syndrome as most Capstone games: great concept but poor execution.

Part of the aborted Quest series, Earth Quest is not really a game but a very well-done reference program that packs an incredibly *huge* amount of information on a few...

Eco-Saurus is an excellent edutainment title from First Byte.

First Person: Marvin Minsky - The Society of Mind is a great CD-ROM from Voyager that includes the full text of Marvin Minsky's groundbreaking book The Society of Mind.