Compatibility features IBM System/360 Model 30
^ capers jones. technical , social history of software engineering. isbn 0133365891.
^ computerworld, april 24, 1989, page 1
^ ibm system/360 disk operating system 1401/1440/1460 emulator programs: compatibility support/30 & /40 (pdf) (third ed.). ibm. february 1969. c27-6940-2.
^ cite error: named reference mod30-func-char invoked never defined (see page).
^ edwin d. reilly (2003). milestones in computer science , information technology. isbn 1573565210.
^ dan ryan. history of computer graphics. dlr associates series. isbn 1456751158.
^ daniel n. leeson; donald l. dimitry (1962). basic programming concepts , ibm 1620 computer. holt, rinehart , winston.
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