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    The Creative Commons license explicitly states that it’s not meant for software.

    My personal recommendation for a good public domain license is the 0BSD-license, which is the ISC-license (which again is a reduced MIT-license) with the attribution clause removed. I would always state the license name at the top and, unlike OSI, explictly mention the copyright:

    0BSD-License
    
    Copyright 2010-2022 John Doe <john@doe.com>
    
    Permission to use, copy, modify, and/or distribute this software
    for any purpose with or without fee is hereby granted.
    
    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
    WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
    THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
    CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
    FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
    CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    

    I think that it elegantly solves the problem that there are still many jurisdictions that don’t have the concept of a public domain. Instead, you remain the copyright holder and claim the copyright, but don’t impose the rule that you’re attributed for this in any form. The license is also extremely simple.

    If you want attribution, use the ISC-license instead, which has a slightly different clause:

    Permission to use, copy, modify, and/or distribute this software
    for any purpose with or without fee is hereby granted, provided
    that the above copyright notice and this permission notice appear
    in all copies.
    
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      The Creative Commons license explicitly states that it’s not meant for software.

      For the “normal” CC-xx licenses, yes. Not for CC0.

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        Yeah, but I think there are some works that don’t really fit too well in either category and I think that’s why some people choose it.