plural of years and abbreviations
1990s and MDs, without an apostrophe.
Add s with no apostrophe: the 1990s, MDs, PCs. Do not write 1990’s or MD’s for the plural.
Examples
Use the 2000s
Use two CDs
Avoid the 2000’s
1990s and MDs, without an apostrophe.
Add s with no apostrophe: the 1990s, MDs, PCs. Do not write 1990’s or MD’s for the plural.
Use the 2000s
Use two CDs
Avoid the 2000’s