This license is a public domain declaration (NIST is a United States Government Agency) combined with a MIT variant to cover cases where copyright would apply to the software. Because their "MIT-like" wording is not the same as the standard MIT license, we have given it a unique identifier. It is Free and GPL compatible (in either the Public Domain state or the MIT-like state).
A copy of their license was taken from https://www.nist.gov/director/copyright-fair-use-and-licensing-statements-srd-data-and-software on 2018-05-21.
NIST Software Like non-SRD data, software produced at NIST is generally not subject to copyright protection in the United States, but may be subject to foreign copyright (as per 17 U.S.C. §105 (https://www.govinfo.gov/content/pkg/USCODE-2014-title17/pdf/USCODE-2014-title17-chap1-sec105.pdf) ). Like data/works, domestic copyright may be held be NIST if copyright is assigned to NIST by a third-party (e.g. contractor). Distributions of NIST created software, whether in source or compiled form, should include the following licensing statement: This software was developed by employees of the National Institute of Standards and Technology (NIST), an agency of the Federal Government and is being made available as a public service. Pursuant to title 17 United States Code Section 105, works of NIST employees are not subject to copyright protection in the United States. This software may be subject to foreign copyright. Permission in the United States and in foreign countries, to the extent that NIST may hold copyright, to use, copy, modify, create derivative works, and distribute this software and its documentation without fee is hereby granted on a non-exclusive basis, provided that this notice and disclaimer of warranty appears in all copies. THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER. Distributions of NIST software should also include copyright and licensing statements of any third-party software that are legally bundled with the code in compliance with the conditions of those licenses. Contact the NIST Office of Chief Counsel. Recommendations for citation of software are provided at https://www.nist.gov/open/license.