Abbreviations
4.1.6 Abbreviations
Within the body of the table and in column headings, units of measure and numbers normally spelled out may be abbreviated for space considerations (see 14.12, Abbreviations, Units of Measure; 18.0, Units of Measure; and 19.0, Numbers and Percentages). However, spelled-out words should not be combined with abbreviations for units of measure. For example, “First Week” or “1st wk” or “Week 1” may be used as a column heading, but not “First wk.” Abbreviations or acronyms should be explained in a footnote (see 4.1.3, Table Components, Footnotes).