What does ALCOR stand for?

ALGOL Conversion (SAUS)

ARPA- Advanced Research Projects Agency/Lincoln C-Band Observable Radar - U.S. Army Regulations (MLEX)

ARPA - Advanced Research Projects Agency/Lincoln C-Band Observable RADAR - Army (AABC)

ARPA - Advanced Research Projects Agency Lincoln Laboratory C-Band Observable RADAR - Radio Detection and Ranging - Military technology (DDF)