From Future Player's Companion: Tomorrows' Evolution "For the Gamemaster:"
The Future Player's Companion does not present new rules, powerups, or optional reinterpretations of the modern and future d20 System games. It is designed with the same principles, decisions, and guidelines that the original designers used. We know this because it is written, edited, and produced by people who were involved in creating both the d20 Modern Roleplaying Game and d20 Future. This is material that might have even gone in the original products if size, cost, time, and other practical matters were not an issue.