3-letter words starting with o
- oof — Object-Oriented Fortran
- ooh — the exclamation “ooh.”.
- ook — The cry of a monkey.
- oom — (South Africa) An older man, especially an uncle. (Frequently as a respectful form of address.) (from 19th c.).
- ooo — OpenOffice.org
- oop — object-oriented programming
- oos — Plural form of oo.
- oot — (Geordie) anything.
- op- — ob-
- opc — OLE for Process Control
- ope — (now dialectal or poetic) Open. (from 13th c.).
- opf — Object Persistence Framework
- opp — (mathematics, high school) opposite.
- ops — op art.
- opt — to make a choice; choose (usually followed by for).
- ora — plural of os2 .
- orb — Object Request Broker
- orc — any of several cetaceans, as a grampus.
- ord — Order.
- ore — a metal-bearing mineral or rock, or a native metal, that can be mined at a profit.
- orf — (obsolete) Cattle.
- org — Organization (in Internet addresses).
- orm — 1. (programming, database) object relational mapping. 2. (programming) Object Role Modeling.
- orn — (obsolete) To ornament; to adorn.
- oro — gold.
- orr — Sir John Boyd, Boyd Orr, Sir John.
- ors — a Boolean operator that returns a positive result when either or both operands are positive.
- ort — Usually, orts. a scrap or morsel of food left at a meal.
- os2 — (spelling) Normally written "OS/2".
- osa — 1. Open Scripting Architecture. 2. Open System Architecture.
- osb — Order of Saint Benedict
- osd — Open Source Definition
- osf — Open Software Foundation
- osh — a city in SW Kirghizia, SW of Bishkek.
- osi — 1. (networking) Open Systems Interconnection. 2. Open Source Initiative.
- osp — optical computing
- oss — Office of Strategic Services
- ost — Alternative form of oast.
- ot- — oto-
- otb — off-track betting: betting at an establishment outside a racetrack
- otc — OTC is an abbreviation for over-the-counter.
- ote — on-target earnings: referring to the salary a salesperson should be able to achieve
- oth — Obsolete spelling of oath.
- oto — a member of a Siouan-speaking tribe of North American Indians who formerly inhabited the lower Missouri River basin and now live in Oklahoma.
- otp — 1. (security) One-Time Password. 2. (protocol) Open Trading Protocol. 3. (storage, integrated circuit) One Time Programmable Read Only Memory. 4. (communications, library) Open Telecom Platform.
- ott — Over the top.
- oud — a musical instrument of the Middle East and northern Africa belonging to the lute family.
- oui — yes
- oup — Oxford University Press
- our — (used to denote the narrator of a literary work written in the first person singular).