What is the correct way to pluralize an acronym?
I am defining an acronym which will be substituted for some unwieldy term in a document.
One thing Gary has talked extensively about is his inclination towards extracting domain objects into Plain Ruby Objects (PRO).
The trouble is that the first time I use the unwieldy term (Plain Ruby Object), it is plural. However, the acronym is more useful in the singular.
Should I just hold off defining the acronym until I use its singular form further down the page?