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The Natural Bears Classification System (NBCS or the bear code) is a set of symbols using letters, numbers and other characters commonly found on modern, Western computer keyboards, and used for the self-identification of those who self-identify as “bears” in the sense of a mature gay or bisexual man with facial or substantial body hair. These codes are used in email, Usenet, and Internet forum postings to identify the physical type and preferences of the poster.

A sample bear code is:
B4 s- m g++ w d+c t+ f+ k+ r e+(+?)

Translation (in no particular order):
Reasonably thick beard, cub tendencies, definite Daddy, (endowment) gets attention, above average fur, loves groping/pawing/touching, (Kinkiness) loves most things, (Muscle) some definition/Blue collar, spends some time outdoors, (sex) plays under special circumstances, tall, bear with a tummy