The draft board designated him 1-A-O, meaning he could serve only in noncombat military roles because of his conscientious objector status.

After the hearing, the board officially recorded his status as 1-O, allowing him to perform alternative civilian service supporting public health.

I grabbed the o-scope from the bench to check the waveform on the amplifier.

The lab ordered new o-scopes to replace the outdated units on the benches.

When the captain fell ill, the 1/O took command and led the crew through the storm.

They found a battered billy-o at the back of the closet and decided to restore it.

When the travelling market rolled into town, the rabbit-o set up a small stall and called out about the fresh meat he had for sale.

After the final song, the crowd gave the band a thunderous standing O.

She drew an o-mikuji at the shrine and smiled at the paper that predicted good luck.

right-o, I'll start the presentation now.