Technical Information Technical Information Abbreviations Equations, mathematical formulas, flow diagrams Submit complicated equations and flow diagrams as glossy prints or as clean line drawings for direct photographic reproduction.
Decimals are preferred to fractions.
Use metric system only. The metric system is standard, and SI units should be used as far as possible. Spell out all numbers or fractions that begin a sentence. If this is awkward, rephrase the sentence to avoid beginning with a numeral. The dash may be used in tables, figures, graphs and in parentheses.