Famous Abbreviations and Acronyms
- OJOrenthal James
- OJOscar Johnson
- OJSOrenthal James
- OJSOrenthal James Simpson
- OKOrrins Kendall
- OLLYOliver Stanley (musician)
- OMHOld Mother Hubbard
- ONJOlivia Newton-John
- OO7James Bond
- OOOMickey Mouse
- OOTPHarry Potter and The Order of The Phoenix
- OSO Sullivan
- OSCOrson Scott Card (Sci-fi author)
- OWOscar Wilde
- OWHOld Weird Herald
- PAPrince Albert
- PBPeter Bartram
- PBPoo Bear
- PBPooh Bear
- PBPadington Bear
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