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1620-PR-025_1620_Monitor_I_Listings_and_Flowcharts_Jul63.pdf 59.44 MB 🧲
1620-PR-029_1620_Monitor_II_Listings_and_Flowcharts_Version_2.pdf 42.90 MB 🧲
1620-PR-033_1620-1443_Monitor_I_Listings_and_Flowcharts_Sep65.pdf 57.06 MB 🧲
A26-5739-4_IBM_1620_Monitor_I_System_Reference_Manual_1965.pdf 11.99 MB 🧲
C26-5774-0_1620_Monitor_II_System_Reference_Manual_May64.pdf 12.13 MB 🧲
C26-5774-1_1620_Monitor_II_System_Reference_Manual_Apr65.pdf 12.49 MB 🧲
C26-5793-0_1620_SPS_III_Programming_System_Reference_1964.pdf 4.76 MB 🧲
R20-8005-1_1620_Monitor_I_Programming_System_Education_Guide_1963.pdf 4.50 MB 🧲