| On Demand, On Account, Omnibus Budget Reconciliation Act of 1993 | |
| On-Sale Date, On-The-Job Training (OJT), One-Hundred-Percent Location |
Requested but not yet delivered, as in Our new sofa is on order. This term is always used for goods of some kind, the noun order having been used in the sense of "a commission for goods" since the early 1800s.