List of acronyms: 0–9

This list contains acronyms, initialisms, and pseudo-blends .

For the purposes of this list:

acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).

(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome

(i) = initialism, e.g.: CD – (i) compact disc

(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women

(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)

Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.

0–9

0D – Zero-dimensional
1, – Onekama, Michigan (word play based on "one, comma")
1AM – Air mechanic 1st class
1D – One-dimensional
2AM – Air mechanic 2nd class
2D – (i) Two-dimensional
2.5D – (p) "Two-and-a-half-dee": two-dimensional computer graphics where some flat images lie in front of others
2G – (i) Second-generation mobile (cellular, wireless) telephone system
2.5G – (p) Second-and-a-half-generation mobile telephone system
2LA – Two letter acronym
2Lt – 2nd lieutenant
3AM – Air mechanic 3rd class
3D – (i) Three-dimensional
3G – (i) Third-generation mobile telephone system
3i – (i) Investors In industry (venture capitalists)
3M – (i) Minnesota Mining and Manufacturing Company
4D – (i) Four-dimensional (usually three spatial plus one temporal dimension, sometimes four spatial ones)
4G – (i) Fourth-generation mobile telephone system
4GL – (i) Fourth-generation programming language
4WD – (i) Four-wheel drive
5D – Five-dimensional
5G – fifth generation mobile telephone system
6D – Six-dimensional
7D – Seven-dimensional
8D – Eight-dimensional
9D – Nine-dimensional

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