MOOSE, originally an acronym for Man Out Of Space Easiest but later changed to the more professional-sounding Manned Orbital Operations Safety Equipment, was a proposed emergency "bail-out" system capable of bringing a single astronaut safely down from Earth orbit to the planet's surface. Neither NASA nor the U.S. Air Force expressed an interest in the MOOSE system, and so by the end of the 1960s, the program was quietly shelved.