otp

(computing) Initialism of one-time password: a password that is valid for only one login session or transaction.

(fandom slang) Initialism of one true pair (or pairing): the romantic pairing preferred by an author or reader of fan fiction.

(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.]

Initialism of one-trick pony. [A performing animal (especially a pony) that knows only one trick.]

(South Africa) Initialism of offer to purchase.

(telecommunications) Initialism of Open Telecom Platform.

(computing) Initialism of Opposite Track Path.

(electronics) Initialism of one-time programmable.