noun: (cryptography) Initialism of one-time pad. [(cryptography) A form of encryption where each bit or character from the plaintext is encrypted by a modular addition with a bit or character from a secret random key (or pad) of the same length as the plaintext.]
noun: (computing) Initialism of one-time password: a password that is valid for only one login session or transaction.
noun: (fandom slang) Initialism of one true pair (or pairing): the romantic pairing preferred by an author or reader of fan fiction.
noun: (telecommunications) Initialism of Open Telecom Platform.
noun: (computing) Initialism of Opposite Track Path.
adjective: (electronics) Initialism of one-time programmable.
adjective: (instant messaging) Initialism of on the phone.
