Spelling Rules -- Making Noun Plurals - Page 3


Rule 8: The plurals of single capital letters, acronyms and Arabic numerals (1, 2, 3,) take an -s without an apostrophe:
  1. Z (the capital letter Z) --- Zs
  2. POS (Point Of Sale) --- POSs
  3. ATM (Automatic Teller Machine) --- ATMs
  4. 7 (the Arabic numeral 7) --- 7s
Rule 9: Of course you cannot make a plural of an uncountable noun.
  1. information
  2. blood
  3. paint
  4. harm

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