# OSI vs OTC

> English confusable word pair

## The two words

### OSI
*name · frequency rank #39,943*
Initialism of Open Systems Interconnection, an International Standard ISO/IEC 7894:1994(E) subtitled Basic Reference Model, containing a formal description of an idealized computer network architecture.

### OTC
*adjective · frequency rank #23,621*
Initialism of over-the-counter.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/osi-vs-otc