I'm saving my money fo the trip next month.

Before the press run began, the editor checked that every layout conformed to the fo dimensions.

The villagers lit lanterns and recited sutras before Fo each evening.

FO! Don't start with me again.

The FO reviewed the preflight checklist while the captain finished the weather briefing.

I'm saving some money fo' my little sister's college fund.

Before binding the ledger, check that each fo is correctly numbered.

Researchers named the new compound chloridino-fos, using the -fos suffix to signal that it is a phosphorus-based insecticidal derivative.

In the study, several fos-derivatives were synthesized to evaluate their activity as cholinesterase inhibitors.

The FOs inspected every safety checklist before takeoff.