
Examples: meter, liter, and deka, NOT metre, litre, and deca. All units and prefixes should be spelled as shown in this guide. Incorrect Terms | Pronunciation | Conversions | Time | International Paper Sizes Spelling Spelling | Plurals | Capitalization | Spacing | Punctuation | Decimal Point | Prefixes NIST SP 811 provides an editorial checklist for reviewing manuscripts' conformity with the SI and the basic principles of physical quantities and units. Verbal pronunciation of SI terminology is purposefully not addressed in the BIPM SI Brochure (French is the primary language, English is secondary), NIST SP 330 (uses American English spelling), NIST SP 811 (uses American English spelling), or IEEE/ASTM SI 10.


International SI style and usage publications focus on written communication. Values of quantities are expressed using Arabic symbols for numbers paired with a unit symbol, often with a prefix symbol that modifies unit magnitude.

Electric Vehicle Fueling and Submetering.Legal Metrology Devices Expand or Collapse.Laws and Regulations Expand or Collapse.Laboratory Metrology Expand or Collapse.International Legal Metrology Expand or Collapse.Resources for Continuing Education and Training.The following table documents the most common of these - along with each symbol’s usage and meaning.

Probability and statistics both employ a wide range of Greek/Latin-based symbols as placeholders for varying objects and quantities.
