Copyright. Postman's Sort (tm) is a computer program owned by Robert Ramey and is protected by United States copyright laws and international treaty provisions. Therefore, you must treat the software just like any other copyrighted material such as book or musical recording except that you may one copy of the program solely for backup or archival purposes. You may not copy the written materials accompanying the program.
Just like a book means that this software may be used by any number of people and may be freely moved from one computer location to another so long as there is no possibility of it being used at one location while it is being used at another. In the same way that two different people in two different places cannot read the same book at the same time, neither may the software be used by two different people in two different places at the same time without violating Robert Ramey's copyright. U.S. Government Restricted Rights
This program and documentation are provided with Restricted Rights. Use, duplication, or disclosure by the Government is subject to restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 or sub-paragraphs (c)(1) and (2) of the Commercial Computer Software -- Restricted Rights at 48 CFR 52.227-19, as applicable. Manufacturer is Robert Ramey, Santa Barbara, CA 93110.