## How to write an abbreviation of a plural form of the term

1

If I am writing text which contains plural form of a term that I include its abbreviation in brackets, should I include the s in the term itself inside the brackets or outside or not include the s in the term at all? Example:

The devices' Random Number Generators (RNGs)

Or

The devices' Random Number Generators (RNG)s

Or

The devices' Random Number Generators (RNG)

Should that be plural anyway? "The devices' Random Number Generator (RNG)..." Does each device have more than one RNG, or a different RNG in each one? – Weather Vane – 2020-01-05T20:23:34.697

1@WeatherVane It's still a good question regardless of whether there is more than one RNG. The same question can legitimately be asked about many other initialisations, for example "... the cars' Diesel Particulate Filters (DPFs)"; "... the card holders' Personal Identification Numbers (PINs)" and so on. – BoldBen – 2020-01-05T20:58:44.513

@BoldBen granted, your example about PINs is good. – Weather Vane – 2020-01-05T21:00:50.727

@ Weather Vane it is a " different RNG in each one". – None – 2020-01-05T21:05:47.477