Universal Personality Profile

Characters in Traveller are precisely defined using the Universal Personality Profile (UPP), which expresses the basic characteristics in a specific sequence using hexadecimal (base 16) notation. Characteristics are listed as a string of six digits, in the order originally rolled: Strength, Dexterity, Endurance, Intelligence, Education, and Social Standing.

For example, a character who is totally average in all respects would have a UPP of 777777. If, instead, the individual were highly intelligent, his UPP would be 777B77 (the B in the fourth position indicates an Intelligence of 11). While the use of the UPP is optional, it allows the Referee (and the players) to tell at a glance the characteristics of persons they encounter and deal with.