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    #1

    trademark; registered

    MS-DOS User's Guide, 3rd edition, is for anyone who wants to be proficient in using the most widely used microcomputer operating system in the world.
    Millions of computers, from Altos to Zenith®, operate under ...

    What's the difference between and ®? Isn't the circled capital letter R also a trademark symbol?
    Last edited by sitifan; 26-Jul-2014 at 08:00.
    I need native speakers' help.

  1. Matthew Wai's Avatar
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    #2

    Re: trademark; registered

    I am not a teacher.
    The following is quoted from http://fsymbols.com/computer/trademark/

    • ™ tm for an unregistered trademark
    • ® r for a registered trademark.

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