Intermec 6640 Technical Reference page 146

Toolkit for the 6640 Computer
" NOTE:
4-86 6640 Mobile Computer Technical Reference
Control Panel
Identification
We recommend that you avoid a computer name or a share name
with a space or a wild character, such as an asterisk (*), a semicolon
(:), or an exclamation point (!). These characters or a blank space
may cause unpredictable results.
Start → Settings →
Network
Computer name
SECTION 4