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I've had trouble finding easily accessible information on what exactly the ampersat does in TeX- it seems to be used frequently in the implementations of the commands I use, yet I've never had to use it. (Granted I've only used LaTeX) What does the ampersat do in TeX?

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  • I thought the @ sign was called an "ampersat"... Apparently not that often?
    – user41692
    Jan 21, 2015 at 5:01
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    @Anthony If given a name, it's usually a 'commercial at', with 'ampersat' being a name that's been suggested based on analogy with ampersand (&).
    – Joseph Wright
    Jan 21, 2015 at 7:02
  • 'Commercial at'? What's commercial about it?
    – user41692
    Jan 21, 2015 at 7:03
  • Perhaps also see tex.stackexchange.com/questions/27803/…
    – Joseph Wright
    Jan 21, 2015 at 7:04
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    @Anthony The symbol was introduced for producing invoices and the like: '10 widgets @ 10 p each'. (It's come down to us from the days of the telegraph.)
    – Joseph Wright
    Jan 21, 2015 at 7:04

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