| an electronic device used by phone phreaks to send out signals that unlock long-distance telephone circuits. |
| blue box also blue-box (blōō'bŏks') n. Slang An electronic device having a tone pulsator that prevents telephone equipment from registering long-distance charges. |
Blue Box operating system
The complete implementation of the Mac OS run-time environment on the more modern Rhapsody operating system. Blue Box is not an emulation layer; at any given time it will be based on the same source code and ROM image as the current version of Mac OS and will thus incorporate future Mac OS improvements.
(1997-10-15)