If the word forms part of a longer name, do not abbreviate it under any circumstances: are also written in full but are not capitalized except in main headings.See 4.30 Parts of a book or document for further treatment of these points.
They may be abbreviated in tabular matter, citations and references, forms and sidenotes.
See 5.12 Representation of time in ordinary prose and with SI units and 5.13 Representation of time of day for additional information.
Many abbreviations will not be understood unless the term is written in full at first mention, with the abbreviation given in parentheses.
Follow these general rules: In recent years there has been a trend toward the omission of periods in abbreviations.
This is particularly true of scientific and technical writing, but the practice has been spreading in general writing as well.
(a) Do not use periods with the following: The honorary title "the Honourable" is used before the names of members of the Canadian Privy Council, lieutenant-governors and certain other officials.
The right-hand column lists the two-character symbols recommended by Canada Post for use with mailing addresses.
For other purposes, use the traditional provincial abbreviations: Bill C-132, assented to on June 10, 1993. Nunavut consists of the eastern part of the Northwest Territories.
In footnotes, endnotes, bibliographies and indexes, words referring to parts of a publication should, in the interest of conciseness, be abbreviated: There is a vast array of technical and scientific abbreviations such as those for mathematical ratios and operations, physical quantities and constants or statistical formulas and notations.
Most unabridged dictionaries list such abbreviations. People working in specific disciplines should consult the appropriate manuals in their field.
The following examples illustrate correct English usage.