# CSI vs CSS

> English confusable word pair

## The two words

### CSI
*noun · frequency rank #20,894*
Initialism of crime scene investigation (a term of forensic science).

### CSS
*noun · IPA /siː ɛs ˈɛs/ · frequency rank #16,676*
Initialism of change segment status, a GDS code used on older types of airline keyboards.

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