"1. GRANT OF LICENSE: Microsoft grants you the right to use one copy of the enclosed Microsoft software program (the "SOFTWARE") on a single terminal connected to a single computer (i.e. with a single CPU). You may not network the SOFTWARE or otherwise use it on more than one computer or computer terminal at a time."

o o o

copyright and other stuff

o o o

"6. OTHER RESTRICTIONS: You may not rent or lease the SOFTWARE, but you may transfer your rights under the Microsoft License Agreement on a permanent basis provided transfer all copies of the SOFTWARE and all written materials, and the recipient agrees to the terms of this Agreement. You may not reverse engineer, decompile or disassemble the SOFTWARE. Any transfer must include the most recent update and all prior versions."

The way I read that, there is no tie-in to a specific machine, so the guy is in good shape provided the number of machines <= number of licenses,

A copy of MS-DOS 5.0 (from OEM - Phoenix) and MS-DOS 6.0 Upgrade (from Microsoft) available for sale here! :)