Intermec CK31 User Manual page 17

Before You Begin
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Permission to use, copy, modify, distribute and sell this software
and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this
permission notice appear in supporting documentation. Dr.
John Maddock makes no representations about the suitability of
this software for any purpose. It is provided "as is" without
express or implied warranty.
CK31 Handheld Computer User's Manual