# DOI vs DOS

> English confusable word pair

## The two words

### DOI
*noun · IPA /diː əʊ aɪ/ · frequency rank #20,341*
Initialism of date of incident.

### DOS
*noun · IPA /diː oː ˈɛs/ · frequency rank #11,370*
Initialism of date of service.

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