XPLORE TECHNOLOGIES XC6 User Handbook Manual page 87

Appendix C. Glossary
Subscriber Identity Module (SIM). A smart card inside a GSM
(Global System for Mobile communications) cellular device that
encrypts voice and data transmissions and stores data about the
specific user so that the user can be identified and authenticated by
the network supplying the phone service. A SIM can be moved from
one device to another and/or different SIMS can be inserted into any
GSM radio.
Universal Serial Bus (USB). A serial interface that enables
communication between devices and the computer.
XC6 User's Handbook
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