To be fair, big O and little o have different meanings in asymptotic notation, and I guess it doesn't pronounce as well as "big omicron" and "little omicron". (

To be fair, big O and little o have different meanings in asymptotic notation, and I guess it doesn't pronounce as well as "big omicron" and "little omicron". (Although Ω and ω are both used as well.)