TheWorm123 wrote:Seems to mostly be a mix of C and C++ with some SABREtalk left.
aklrno wrote:Sabretalk was a version of PL/1. PL/1 didn’t come out until the late 60’s. So it was after COBOL. I don’t think either FORTRAN or Cobol would have been suitable for Sabre so I suspect it would have been written in 7090 assembler language using MAP, the macro assembler program. I am not sure what they would have used for an operating system if they used one at all. IBSYS, the normal OS for a 7090 was not suitable for real time systems. They might have used some other system IBM developed for the military or NASA. Although NASA used 7090’s in the 60’s they weren’t the real time systems used for launch and mission control. Those were probably Honeywell systems designed for real-time apps. The 7090 was used for offline stuff like orbital calculations.
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