BESYS

BESYS (Bell Operating System) was an early computing environment originally implemented as a batch processing operating system in 1957 at Bell Labs for the IBM 704 computer.

==Overview== The system was developed because Bell recognized a "definite mismatch...between the 704's internal speed, the sluggishness of its on-line unit-record equipment, and the inherent slowness of manual operations associated with stand-alone use." According to Drummond, the name BESYS, though commonly thought to stand for BEll SYStem, is actually a concatenation of the preexisting SHARE-assigned installation code BE for Bell Telephone Laboratories, Murray Hill, NJ and the code assigned by SHARE for systems software, SYS.