From Palm Databases:
This simple database contains over 600 entries of main storylines found in the DC Universe. Includes all the "Crisis" crossover titles, Superman's Exiled in Space storyline, Panic in the Sky, and the Reign of the Supermen. Because I'm partial to The Man of Steel, most of the titles are Superman related.
As with the DC Firsts database, this database includes two convenient fields "Got it" and "Want it" to help you with your collection.