Nouns
Plural nouns
In general, form the plural of a noun by adding s. If the noun already ends in s, form the plural by adding es. This rule applies to proper nouns as well as common nouns.
Microsoft style
the Johnsons
the Joneses
Form the plural of an abbreviation by adding an s with no apostrophe.
Microsoft style
ISVs
DBMSs
If an abbreviation already represents a plural, do not add an s. For example, the abbreviation for Microsoft Foundation Classes is MFC, not MFCs.
Form the plural of a single letter by adding an apostrophe and an s. The letter itself (but not the apostrophe or the ending s) is italic.
Microsoft style
x’s
Form the plural of a number by adding an s with no apostrophe.
Microsoft style
486s
the 1950s
International considerations
Do not add (s) ...
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