Blue box is an early phreaking tool that simulates a telephone operator's dialing console. Blue box may also refer to: Technology Link Trainer or Blue Box, a flight simulator Blue Box, a Mac OS 8 emulation layer from the Rhapsody OS which became the Mac OS X Classic Environment MXR Blue Box, an octave effect for electric guitars Nickname of Hessdalen AMS, as it uses a blue container Entertainment TARDIS, or "the blue box", a time machine and spacecraft in the British TV series Doctor Who Blue Box (novel), a Doctor Who novel by Kate Orman Blue Box (album), a 1996 album by Kate Ceberano Blue Box (manga), a manga series by Kōji Miura Bluebox Limited, a film production company Other uses Blue Box, common name for the tree species Eucalyptus baueriana and Eucalyptus magnificata Blue box (WTO agreement), a subsidy category of the World Trade Organization Blue box recycling system, initially a waste management system used by Canadian municipalities A nickname for Kraft Dinner packaged stovetop macaroni and cheese A British police box A severe thunderstorm watch, in meteorology JNF collection boxes, Jewish National Fund blue charity collection boxes