RPG Data Con: Data Conversion Charts (1992)

From back cover:
What you are holding in your hands is a complete set of charts and tables that will allow you to take a character from within one Role-playing game "Genre" and place them into another. Most major game systems are covered and include: Fantasy, Cyberpunk, Comic Book, Horror, Space, Mech and Multi-genre... These charts will give you the ability to convert to and from almost any system once you become familiar with the conversion process.

From Introduction:
This is not to be taken as a Game Master's Bible, rather it should be used as a general guide.