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How should one go about abbreviating (a)synchronous? Is the most correct form (a)sync. or (a)synch.?

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    Hello User. In my opinion this is easily answerable looking at the dictionary. I couldn't find "async", but "sync" is in every dictionary; Same goes for "synch" more or less, so I suppose it's up to you about which one to use.
    – Alenanno
    Commented Aug 28, 2011 at 12:12
  • See related past tense of synchronize and which is correct synced or synched.
    – Kit Z. Fox
    Commented Aug 28, 2011 at 15:06
  • Both abbreviated forms are used. It kinda depends on which computer or computer language you worked with first.
    – Hot Licks
    Commented Sep 21, 2016 at 0:19

2 Answers 2

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The common and my preferred way of abbreviating synchronous is sync, rather than synch, partly because it makes more sense to pronounce it as sink than sinch and the shorter abbreviation is simpler and clearer. Also to avoid any confusion with the slang word cinch (pronounced like sinch).

For similar reasons and consistency, I'd recommend async over asynch.

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  • As a bonus, it's also one letter shorter! Commented Aug 28, 2011 at 13:12
  • Yes! Save time, ink and disk space!
    – Hugo
    Commented Aug 28, 2011 at 14:36
  • Why do you say "cinch" is slang? Commented Sep 15, 2016 at 0:23
  • @Azor-Ahai It's an informal term for something that's easy to do.
    – Hugo
    Commented Sep 15, 2016 at 7:34
  • @Hugo Oh, I see. It also has non-slang use, a "cinch" sack, which is what I was thinking of. Commented Sep 15, 2016 at 17:25
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Ngram for "sync" versus "synch", 1920-2000

The graph for async versus asynch is similar. From this I would say that sync and async are preferred.

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  • The image is broken, please could you fix it?
    – Hugo
    Commented Sep 20, 2016 at 7:41

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