Is It an S or a S?

It’s an S. Because the pronunciation of the letter "S" begins with a vowel sound (it sounds like "ess"), we use the article "an".

Is It an RGB or a RGB?

It’s an RGB. We pronounce the abbreviation RGB as individual letters, and the letter "R" starts with a vowel sound; therefore, it takes the article "an".

Is It a REM or an REM?

It's a REM. Because the acronym REM is usually pronounced as a word that starts with a consonant sound, we use the indefinite article "a".

Is It an R&D or a R&D?

It’s an R&D. Since the letter "R" begins with a vowel sound (similar to "are"), the abbreviation R&D takes the article "an".

Is It a RAM or an RAM?

It's a RAM. Since the acronym RAM is typically pronounced as a single word that begins with a consonant sound, it takes the article "a".

Is It an R or a R?

It’s an R. Since the pronunciation of the letter "R" begins with a vowel sound, we use the indefinite article "an".

Is It an NYSE or a NYSE?

When pronouncing the abbreviation NYSE as individual letters, we say an NYSE (the letter "N" starts with a vowel sound).

Is It an NSA or a NSA?

It’s an NSA. Because the pronunciation of the letter "N" begins with a vowel sound, we use the article "an" in front of the abbreviation NSA.

Is It an NRA or a NRA?

It’s an NRA. Despite being a consonant, the letter "N" begins with a vowel sound; consequently, we use the article "an".