The Natural Bears Classification System

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 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.

History
A posting to the alt.sex.motss Usenet newsgroup in 1991 re-produced the NBCS version 1.9, though the document originated before that date (1989), according to its author. This classification scheme was created by Bob Donahue and Jeff Stoner, and was based on the way in which star and galaxy classification systems used characteristics of an object to derive a classifying identifier. This classification scheme has an almost identical syntactic structure to the Geek Code, which was introduced in 1993, though the meanings of the symbols are different.

Format
The format of the NBCS is a sequence of space-separated descriptions that each take the form, "XMme" where X is a letter indicating some trait; M is an optional magnitude indicated by either a number or a sequence of  or   characters (the former are used for rankings that have a broad, but discrete range while the latter is used for more comparative measurements); m is an optional modifier such as "v" which indicates variability of the trait; and e is any extra (such as a parenthesized magnitude that indicates a range from the magnitude outside the parentheses to the magnitude inside).

The format includes physical traits such as "B" for beard density/length, "f" for body hair (or "fur"), "t" for height (or "tallness"), and "w" for weight. It also includes personality traits such as "d" for "the daddy factor" and sexual preferences such as "k" for "the kinky factor".

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