| IBM | GC26-3841-3 OS VS2 Access Methods Rel 3. | IBM 370 OS_VS2 Release_3.8_1978 GC26-38 |
| IBM | GC26-3842-0 Planning for Enhanced VSAM u | IBM 370 OS_VS2 Release_3.0_1975 GC26-38 |
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| IBM | GC26-3847-0 APL Language Mar75 | IBM apl GC26-3847-0_APL_Language_Mar75. |
| IBM | GC26-3847-1 APL Language Feb76 | IBM apl GC26-3847-1_APL_Language_Feb76. |
| IBM | GC26-3847-2 APL Language Jun76 | IBM apl GC26-3847-2_APL_Language_Jun76. |
| IBM | GC26-3857-3 IBM VS COBOL for OS VS Rel 2 | IBM 370 OS_VS cobol GC26-3857-3_IBM_VS_ |
| IBM | GC26-3872-0 OS VS1 Rel 6 Data Management | IBM 370 OS_VS1 GC26-3872-0_OS_VS1_Rel_6 |
| IBM | GC26-3873-0 OS VS2 MVS Data Management M | IBM 370 OS_VS2 Release_3.7_1977 GC26-38 |
| IBM | GC26-3873-0 OS VS2 MVS Data Management M | IBM 370 OS_VS2 Release_3.8_1978 GC26-38 |
| IBM | GC26-3873-1 OS VS2 MVS Data Management M | IBM 370 OS_VS2 Release_3.7_1977 GC26-38 |
| IBM | GC26-3874-0 OS VS1 Data Management Servi | IBM 370 OS_VS1 GC26-3874-0_OS_VS1_Data_ |
| IBM | GC26-3875-0 OS VS2 MVS Data Management S | IBM 370 OS_VS2 Release_3.8_1978 GC26-38 |
| IBM | GC26-3901-1 OS VS1 Rel 7 Utilities Rel 7 | IBM 370 OS_VS1 GC26-3901-1_OS_VS1_Rel_7 |
| IBM | GC26-3902-1 OS VS2 MVS Utilities Rel 3.8 | IBM 370 OS_VS2 Release_3.8_1978 GC26-39 |
| IBM | GC26-3919-1 OS VS Message Library VS1 Ut | IBM 370 OS_VS1 GC26-3919-1_OS_VS_Messag |
| IBM | GC26-3920-1 OS VS2 MVS Utilities Message | IBM 370 OS_VS2 Release_3.8_1978 GC26-39 |
| IBM | GC26-3986-0 VS FORTRAN Prog Ref Feb81 | IBM 370 fortran GC26-3986-0_VS_FORTRAN_ |
| IBM | GC26-3986-1 VS FORTRAN Application Progr | IBM 370 fortran GC26-3986-1_VS_FORTRAN_ |
| IBM | GC26-4035-0 Assembler H Version 2 Genera | IBM 370 asm GC26-4035-0_Assembler_H_Ver |
| IBM | GC26-4037-0 Assembler H Version 2 Langua | IBM 370 asm GC26-4037-0_Assembler_H_Ver |
| IBM | GC26-4056-1 MVS 370 System Programming L | IBM 370 MVS GC26-4056-1_MVS_370_System_ |
| IBM | GC26-4061-1 MVS 370 Linkage Editor Users | IBM 370 MVS GC26-4061-1_MVS_370_Linkage |
| IBM | GC26-4065-1 MVS 370 Utilities Data Facil | IBM 370 DFP GC26-4065-1_MVS_370_Utiliti |
| IBM | GC26-4066-0 MVS 370 VSAM Users Guide Dat | IBM 370 DFP GC26-4066-0_MVS_370_VSAM_Us |
| IBM | GC26-4068-02 MVS Utilities Messages DFP | IBM 370 DFP GC26-4068-02_MVS_Utilities_ |
| IBM | GC26-4140-2 MVS EA Data Administration G | IBM 370 MVS_EA GC26-4140-2_MVS_EA_Data_ |
| IBM | GC26-4141-2_MVS_EA_Data_Administration_M | IBM 370 MVS_EA GC26-4141-2_MVS_EA_Data_ |
| IBM | GC26-4149-2 MVS EA Data Administration J | IBM 370 MVS_EA GC26-4149-2_MVS_EA_Data_ |
| IBM | GC26-4152-2 MVS EA VSAM Administration J | IBM 370 MVS_EA GC26-4152-2_MVS_EA_VSAM_ |
| IBM | GC26-4498-2 Primer for the User of IBM 3 | IBM dasd GC26-4498-2_Primer_for_the_Use |
| IBM | GC27-0052-0 HASP II Version 4 Users Guid | IBM 370 hasp GC27-0052-0_HASP_II_Versio |
| IBM | GC27-0429-2 NCCF General Information Sep | IBM sna acf GC27-0429-2_NCCF_General_In |
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| IBM | GC27-0657-1 Network Program Products Gen | IBM sna GC27-0657-1_Network_Program_Pro |
| IBM | GC27-6939-10 MFT Guide R21.7 Mar72 | IBM 360 os R21.7_Apr73 GC27-6939-10_MFT |
| IBM | GC27-6940-4 360 1401emul | IBM 360 1401_emulator GC27-6940-4_360_1 |
| IBM | GC27-6978-0 DOS Version 4 BTAM | IBM 360 dos btam GC27-6978-0_DOS_Versio |
| IBM | GC27-6979-1 OS VS Supervisor Services an | IBM 370 OS_VS2 Release_1_1972 GC27-6979 |
| IBM | GC27-6980-4 OSVS BTAM SRL Mar82 | IBM 370 btam GC27-6980-4_OSVS_BTAM_SRL_ |
| IBM | GC27-6987-4 Introduction to VTAM Aug75 | IBM sna vtam GC27-6987-4_Introduction_t |
| IBM | GC27-6987-5 Introduction to VTAM Apr76 | IBM sna vtam GC27-6987-5_Introduction_t |
| IBM | GC27-6992-0 HASP II Version 4 System Pro | IBM 370 hasp GC27-6992-0_HASP_II_Versio |
| IBM | GC27-6995-0 VTAM Application Programmers | IBM sna vtam GC27-6995-0_VTAM_Applicati |
| IBM | GC27-6995-2_VTAM_Macro_Language_Referenc | IBM sna vtam GC27-6995-2_VTAM_Macro_Lan |
| IBM | GC27-6995-4 VTAM Macro Language Referenc | IBM sna vtam GC27-6995-4_VTAM_Macro_Lan |
| IBM | GC27-6998-0 VTAM Concepts and Planning M | IBM sna vtam GC27-6998-0_VTAM_Concepts_ |
| IBM | GC27-6998-2 VTAM Concepts and Planning A | IBM sna vtam GC27-6998-2_VTAM_Concepts_ |
| IBM | GC27-6999-0 Introduction to Programming | IBM 3270 GC27-6999-0_Introduction_to_Pr |
| IBM | GC27-6999-2 Intro To Programming 3270 Au | IBM 3270 GC27-6999-2_Intro_To_Programmi |
| IBM | GC28-0278-3 1410 IOCS Card Tape Operator | IBM 1410 GC28-0278-3_1410_IOCS_Card_Tap |
| IBM | GC28-0327-5 1410 OS Cobol | IBM 1410 GC28-0327-5_1410_OS_Cobol.pdf |