Who's Who in the DC Universe Role-Playing Supplement 1 (1992)

From the front cover:

All-New Stats and Diagrams in a Color Loose-Leaf Format

From the back cover:

Did You Know...

That Superman can bench press more than 972.8 million pounds?

That Green Lantern can travel through space at 1,642 times the speed of light?

That Brainiac's I.Q. exceeds 1,683,400?

Find out lots more inside:

• 96 Characters from DC's Who's Who #1-#4
• 7 Color-Coded Categories
• Handy 8-page Comparison Table
• All-New Diagrams
• Updated Statistics
• Unique Powers & Abilities
• DC Comics Appearances through June 1992
• Convenient Hole-Punched Format

This collection of three supplements was based on DC's own series and which covered only the first 13 volumes out of 18 in all. This, on the DC series, from Wikipedia:

In 1990, DC started over with a new Who's Who series titled Who's Who in the DC Universe (16 loose-leaf issues with binders sold separately, cover dated August, 1990 to February, 1992). [...] This series was followed up by Who's Who in the DC Universe Update 1993 (2 loose-leaf issues, cover dated December, 1992 and January, 1993).

for additional information see Wikipedia