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Re:ABCs of IBM z/OS System Programming Volume 1 by MyDogHasFleas on Sunday August 23, 2015 @06:54PM (#10107037)
AFAIK, SABRE is/was an airlines reservation system, not a GDS. SABRE evolved into TPF which is not related to z/OS except inasmuch as they are both operating systems that run on IBM z-series mainframes.

See http://www-03.ibm.com/systems/z/os/ for a list of IBM z-series operating systems.

Re:ABCs of IBM z/OS System Programming Volume 1 by bdg on Sunday August 23, 2015 @07:45PM (#10107214)
I worked with SABRE -- it's a GDS, and a reason I really want to avoid the entire industry.
Re:ABCs of IBM z/OS System Programming Volume 1 by ajdlinux on Sunday August 23, 2015 @07:08PM (#10107091)
SABRE is a GDS - it's used by a whole bunch of US and non-US airlines.