| Section
| Date
| Issue
| Size
| Title
|
| 254-000-000 | 1985-08-01 | 36 | 2.36 MB | Numerical Index - Division 254 - Stored Program Control |
| 254-000-000 | 2000-08-01 | 97 | 90.58 KB | Stored Program Control - Numerical Index - Division 254 |
| 254-001-014 | 1997-08-01 | 6 | 754.62 KB | 3B20D and 3B21D Computers - Equipment Test List |
| 254-001-014 | 1998-06-01 | 7 | 204.40 KB | 3B20D Computer - Equipment Test List |
| 254-101-301 A | | 1 | 445.66 KB | Store Trouble Locating Procedure - Stored Program Control No. 1A |
| 254-251-005 | 1993-11-01 | 7 | 1.33 MB | 1A Processor - Call Store / Program Store (TOP) |
| 254-251-010 | 1988-10-01 | 6 | 1.02 MB | Auxiliary Data Systems - 1A Processor (TOP) |
| 254-251-022 | 1993-12-01 | 3 | 1012.75 KB | J5A006D-01 Input/Output Processor Frame - 1A Processor (TOP) |
| 254-280-040 | 1983-02-01 | 4 | 11.32 MB | Diagnostic Language - DL-1 - Software Description - 1A Processor |
| 254-280-111 | 1982-12-01 | 5 | 1.54 MB | Input/Output Programs - Software Description - 1A Processor |
| 254-280-220 A | 1979-12-01 | 1 | 36.87 KB | Diagnostic Programs - Software Description - 1A Processor |
| 254-280-260 | 1977-06-01 | 1 | 1.56 MB | Audit Programs - Software Description - 1A Processor |
| 254-280-260 A | 1979-12-01 | 3 | 32.09 KB | Audit Programs - Software Description - 1A Processor |
| 254-280-310 | 1982-12-01 | 5 | 10.22 MB | Fault Recovery Programs - Software Description - 1A Processor |
| 254-300-100 | 1977-11-01 | 1 | 30.38 MB | 3A Processor - Description - Common Systems |
| 254-300-110 | | 1I | 12.58 MB | 3A Central Control - Description - Common Systems |
| 254-300-120 | 1977-09-01 | 1 | 4.24 MB | 3A Central Control (3A CC) - Theory of Operation - Common Systems |
| 254-300-130 | 1978-07-01 | 1 | 12.29 MB | Input/Output Interfaces - Description and Theory of Operation - Common Systems |
| 254-300-140 | 1978-09-01 | 1 | 1.72 MB | 3A Processor Power System - Description and Theory of Operation - Common Systems |
| 254-300-150 | 1978-06-01 | 1 | 6.53 MB | 3A Processor Main and Supplemental Stores - Description and Theory of Operation - Common Systems |
| 254-300-160 | 1978-07-01 | 1 | 1.28 MB | Maintenance Frame - Description and Theory of Operation - Common Systems 3A Processor |
| 254-300-170 | 1977-10-01 | 1 | 9.16 MB | Tape Data Controller - Description and Theory - Common Systems |
| 254-300-180 | 1980-07-01 | 2 | 3.28 MB | System Status Panel, System Status Panel Controller, and System Status Panel Relay Unit - Description and Theory of Operation - Common Systems 3A Processor |
| 254-300-190 | 1977-08-01 | 1 | 1.23 MB | Teletypewriter and Teletypewriter Controller - Description and Theory of Operation - Common Systems |
| 254-300-200 | 1977-08-01 | 1 | 7.27 MB | Programmed Magnetic Tape System - Description and Theory of Operation - Common Systems |
| 254-300-301 | 1980-12-01 | 1 | 8.74 MB | 3A Processor Maintenance Data - Common Systems |
| 254-300-301 A | 1981-09-01 | 1 | 83.57 KB | 3A Processor Maintenance Data - Common Systems |
| 254-301-005 | 1992-02-01 | 4 | 2.08 MB | AT&T 3B20D Model 1 Computer - General Description |
| 254-301-010 | 1984-02-01 | 3 | 4.54 MB | Central Control - Description and Theory of Operation - "3B" 20D [3B20D] Model 1 Computer |
| 254-301-020 | 1992-02-01 | 5 | 2.80 MB | AT&T 3B20D Model 1 Computer - Power Systems - Description and Theory of Operation |
| 254-301-100 | 1992-02-01 | 4 | 4.13 MB | AT&T 3B20D Model 1 Computer - Input/Output Interfaces - Description and Theory of Operation |
| 254-301-105 | 1980-01-01 | 1 | 1.62 MB | Input/Output Processor - Description and Theory of Operation - 3B Processor |
| 254-301-110 | 1992-02-01 | 5 | 1.26 MB | AT&T 3B20D Model 1 Computer - Input/Output Processor Peripheral Controllers - Description and Theory of Operation |
| 254-301-210 | 1992-02-01 | 3 | 828.94 KB | AT&T 3B20D Model 1 Computer - 300-Megabyte Disk Drive - General Description |
| 254-301-215 | 1992-02-01 | 4 | 1.23 MB | AT&T 3B20D Model 1 Computer - Storage Module Drive - Disk File Controller - Description and Theory of Operation |
| 254-301-220 | 1983-07-01 | 2 | 633.21 KB | Magnetic Tape System - General Description - 3B20D Model 1 Processor |
| 254-301-810 | 1983-12-01 | 2 | 699.58 KB | Test Equipment - Description - 3B20D Model 1 Processor |
| 254-301-811 | 1993-12-01 | 5 | 759.67 KB | AT&T 3B20 Model 1 Computer - Common Systems - Acceptance and Routine Tasks (DMERT Generic 1 and 2) (UNIX RTR System Release 1) (TOP) |
| 254-301-812 | 1984-07-01 | 2 | 1022.62 KB | Trouble Clearing (TOP) |
| 254-301-821 | 1983-09-01 | 1 | 46.89 KB | 300-Megabyte Moving Head Disk Drive KS-22072,L1 - Preventive Maintenance - 3B20D Model 1 Processor |
| 254-301-822 | 1983-09-01 | 1 | 67.34 KB | 300-Megabyte Moving Head Disk Drive KS-22072,L2 - Preventive Maintenance - 3B20D Model 1 Processor |
| 254-301-910 | 1981-07-01 | P1 | 6.74 MB | System Index and Description - 3B20S Processor |
| 254-302-005 | 1992-02-01 | 6 | 2.32 MB | AT&T 3B20D Computer - General Description |
| 254-302-020 | 1992-02-01 | 5 | 2.65 MB | AT&T 3B20D Computer - Power Systems - Description and Theory of Operation |
| 254-302-105 | 1983-06-01 | 1 | 1.98 MB | Input-Output Processor - Description and Theory of Operation - 3B20D Model 2 Processor |
| 254-302-105 A | 1985-07-01 | 1 | 85.07 KB | Input-Output Processor - Description and Theory of Operation - 3B20D Model 2 and Model 3 Computers |
| 254-302-110 A | 1985-04-01 | 1 | 79.70 KB | Input/Output Processor Peripheral Controllers - Description and Theory of Operation - 3B20D Model 2 and Model 3 Computers |
| 254-302-210 | 1983-10-01 | 1 | 812.71 KB | 300-Megabyte Moving Head Disk Drives - General Description - 3B20D Model 2 Processor |
| 254-302-211 | 1983-10-01 | 1 | 746.25 KB | 160-Megabyte Moving Head Disk Drives - General Description - 3B20D Model 2 Processor |
| 254-302-212 | 1992-02-01 | 2 | 1015.03 KB | AT&T 3B20D Model 3 Computer - 340-Megabyte Disk Drive - General Description |
| 254-302-213 | 1994-02-01 | 3 | 1.01 MB | AT&T 3B20D Computer - Small Computer System Interface - Disk Unit Package - General Description |
| 254-302-216 | 1992-02-01 | 2 | 2.39 MB | AT&T 3B20D Computer - Small Computer System Interface - Disk File Controller - Description and Theory of Operation |
| 254-302-220 | 1983-07-01 | 1 | 1.38 MB | Magnetic Tape System - General Description - 3B20D Model 2 Processor |
| 254-302-221 | 1985-03-01 | 1 | 2.00 MB | Magnetic Tape System KS-23113 - General Description - AT&T 3B20D Model 2 and Model 3 Computer |
| 254-302-809 | 1983-09-01 | 1 | 538.60 KB | Acceptance Test Plan - Description - 3B20D Model 2 Processor |
| 254-302-810 | 1983-12-01 | 1 | 666.67 KB | Test Equipment - Description - 3B20D Model 2 Processor |
| 254-302-821 | 1983-09-01 | 1 | 46.94 KB | 300-Megabyte Moving Head Disk Drive KS-22072,L1 - Preventive Maintenance - 3B20D Model 2 Processor |
| 254-302-822 | 1983-09-01 | 1 | 67.87 KB | 300-Megabyte Moving Head Disk Drive KS-22072,L2 - Preventive Maintenance - 3B20D Model 2 Processor |
| 254-302-823 | 1983-09-01 | 1 | 47.78 KB | 300-Megabyte Moving Head Disk Drive KS-22707,L1 - Preventive Maintenance - 3B20D Model 2 Processor |
| 254-302-824 | 1983-09-01 | 1 | 64.27 KB | 300-Megabyte Moving Head Disk Drive KS-22707,L2 - Preventive Maintenance - 3B20D Model 2 Processor |
| 254-302-840 | | 4 | 1.87 MB | AT&T 3B20D Model 3 Computer - Common Systems - Acceptance Tasks (MML Formats) (TOP) |
| 254-302-840 A | 1991-05-01 | 2 | 680.38 KB | AT&T 3B20D Model 3 Computer - Common Systems - Acceptance Tasks (MML Formats) (TOP) |
| 254-302-842 | | 1 | 191.48 KB | AT&T 3B20D Model 2 and Model 3 Computer - Common Systems - Trouble Clearing (MML Formats) (5ESS) (TOP) |
| 254-303-100 | 2001-06-01 | 3 | 7.48 MB | 3B21D Computer - Common Systems - Growth/Retrofit Tasks |
| 254-303-101 | 1999-04-01 | 3 | 1.10 MB | 3B21D Computer - Routine Maintenance Tasks |
| 254-303-102 | 2001-05-01 | 3.00 | 1.58 MB | 3B21D Computer - Trouble Clearing Tasks |
| 254-303-103 | 1999-10-01 | 2 | 6.09 MB | 3B20D and 3B21D Computers - UNIX RTR Operating System - Processor Recovery Messages Guide |
| 254-303-104 | 1998-05-01 | 1 | 3.02 MB | 3B20D and 3B21D Computers - UNIX RTR Operating System - Recent Change and Verify Manual |
| 254-303-105 | 2000-01-01 | 3 | 2.61 MB | 3B21D Computer - Hardware Reference Manual |
| 254-303-106 | 2002-02-01 | 1R | 6.25 MB | 3B20D and 3B21D Computers - UNIX RTR Operating System - System Maintenance Manual |
| 254-303-107 | 1997-10-01 | 1 | 1.27 MB | 3B20D and 3B21D Computers - UNIX RTR Operating System - Software Troubleshooting Guide |
| 254-303-110 | 2000-11-01 | 8.0 | 1.94 MB | 3B20D and 3B21D PDS Input Messages Manual |
| 254-303-111 | 2000-11-01 | 8.0 | 6.52 MB | 3B20D and 3B21D PDS Output Messages Manual |
| 254-340-001 | 1979-03-01 | 1 | 876.35 KB | Extended Operating System (EOS) - Overview - Software Subsystem Description - 3A Processor Extended Operating System |
| 254-340-030 | 1982-08-01 | 2 | 1007.35 KB | Processor/Process Management - Tasks, Events and Communication Control - Software Subsystem Description - Extended Operating System, 3A Processor |
| 254-340-031 | 1980-03-01 | 2 | 1006.52 KB | Processor/Process Management - Interrupt Handling and Timer Management - Software Subsystem Description - Extended Operating System, 3A Processor |
| 254-340-040 | 1981-01-01 | 2 | 572.53 KB | Data Administration - Extended Operating System - 3A Processor |
| 254-340-052 | 1979-03-01 | 1 | 709.21 KB | Device Handlers - Software Subsystem Description - Extended Operating System, 3A Processor |
| 254-340-082 | 1980-03-01 | 2 | 1.18 MB | System Utilities - Software Subsystem Description - Extended Operating System - 3A Processor |
| 254-340-084 | 1979-04-01 | 1 | 884.98 KB | Resident Maintenance - Software Subsystem Description - 3A Processor Extended Operating System |
| 254-340-086 | 1980-06-01 | 3 | 2.41 MB | Initialization and Recovery - Extended Operating System - 3A Processor |
| 254-340-088 | 1981-01-01 | 2 | 1.67 MB | Processor Diagnostics - Extended Operating System - 3A Processor |
| 254-340-090 | 1980-03-01 | 2 | 972.13 KB | Peripheral Diagnostics - Software Subsystem Description - Extended Operating System - 3A Processor |
| 254-341-120 | 1986-12-01 | 3 | 4.99 MB | Interface and Integrity Facility - DMERT/UNIX RTR Operating System - AT&T 3B20D Computer |
| 254-341-120 A | 1989-09-01 | 1 | 152.88 KB | Interface and Integrity Facility - DMERT/UNIX RTR Operating System - AT&T 3B20D Computer |
| 254-341-200 | 1986-11-01 | 6 | 2.27 MB | Maintenance and Fault Recovery - Software Subsystem Description - AT&T 3B20D Computer |
| 254-341-211 A | 1985-09-01 | 1 | 38.45 KB | Low Level Access / Software Demand Paging Systems - Software Subsystem Description - AT&T 3B20D Computer |
| 254-341-241 | 1984-12-01 | 1 | 797.98 KB | UNIX RTR Operating System Field Update Facilities - Software Subsystem Description - AT&T 3B20D Computer |
| 254-341-245 | 1986-03-01 | 2 | 959.94 KB | DMERT Operation System Generic Update Facilities - Software Subsystem Description - AT&T 3B20D Computer |
| 254-450-105IS | | 2 | 19.78 MB | Service Manual - AT&T Personal Computer 6300 |