Would it be...

  1. AOB

  2. AoB

  3. AB

or something else?

e.g. "Centre of Gravity" --> [COG/CoG/CG]

  • 3
    All the three forms are in use -- various factors (including the inventor's whim) determine the choice.
    – Kris
    Commented Jun 16, 2015 at 6:28
  • General rules or guidelines for how to create abbreviations (english.stackexchange.com/questions/38408/…)
    – Eilia
    Commented Jun 16, 2015 at 7:46
  • center of gravity is usually cg
    – Fattie
    Commented Jun 16, 2015 at 15:12

2 Answers 2


It depends on the situation, here are some examples:

  • MOAB: Mother of all bombs (though this is probably a Backronym)
  • PoC: Proof of concept
  • USA: United States of America (thanks @Yohann)

I would use the third one :

  1. AB

Like in USA, we do not abbreviate prepositions or pronouns.

The main reason to write "AoB" or "AOB" is to disambiguate with an already existing meaning. Using @Glorfindel example, "Proof of concept" cannot be abbreviated as "PC" because PC is already a well known abbreviation.

The list of abbreviations of CG refers to Center of Gravity in Science and mathematics section.

  • You're right, however there are some exceptions, for example AFJ (Alliance for Justice) and AFLM (Advocates for Life Ministries).
    – Eilia
    Commented Jun 16, 2015 at 7:39

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