WordNet (r) 3.0 (2006):
proton n 1: a stable particle with positive charge equal to the negative charge of an electronThe Free On-line Dictionary of Computing (19 January 2023):
PROTON 1. A home computer made by Acorn Computers under a contract won from the BBC in April 1981. [Details?] 2. Something to do with Microsoft SoftLib? (1994-11-28)