I posed this question to my wife and son. After much debate they both googled it, and that led them to this discussion on another forum that is a very entertaining read.
What's the plural of Olympus? | Amateur Photographer
The reason for asking this question is due to a collection of Olympus camera gear that I acquired today. All of this is from the original owner, complete with manuals and warranties. Bodies are an OM-1, OM-2s program, and OM-10. Lenses are an OM 75-150, OM 50 1.4, OM 50 1.8, and OM 28 3.5. Also included is an Olympus T-20 flash unit, various filters, hood, and hard case.
I had to share a picture fresh out of the box in all their dusty glory. The term "giddy as a school girl" may apply.