'used most commonly when coding integers whose upper-bound cannot be determined beforehand.'

According to Tex Texin, the first numeronym [..] was "S12n", the electronic mail account name given to Digital Equipment Corporation (DEC) employee Jan Scherpenhuizen by a system administrator because his surname was too long to be an account name. By 1985, colleagues who found Jan's name unpronounceable often referred to him verbally as "S12n". The use of such numeronyms became part of DEC corporate culture.[1]