 AS50 : Serial Input/Output
 AS51 : Bit & Byte Testing Procedures
 AS52 : General Delay Routines
 AS53 : Binary Arithmetic Routines
 AS54 : Conversion Routines
 AS55 : Fixed Point Decimal Arithmetic Routines
*AS56 : 2650 Sorting Routines
 AS57 : Binary Floating Point Routines
*AS58 : BCD Arithmetic Floating Point Routines
 M20  : PIPBUG
 MP51 : 2650 Initialization
 MP52 : Low Cost Clock Generator Circuits
 MP53 : Address and Data Bus Interfacing Techniques
 MP54 : 2650 I/O Structures and Interfaces
 SP50 : PC1001
 SP51 : 2650 Demo System
 SP52 : Support Software for NCSS Timesharing System
 SP53 : Simulator V1.2
 SP54 : Support Software for GE Mark III Timesharing System
 SP55 : ABC1500 Adaptable Board Computer
 SS50 : PIPBUG
 SS51 : Absolute Object Format
 TN064: Digital Cassette Interface
 TN069: 2650 Microprocessor Keyboard Interfaces
 TN072: Signetics 2651 PCI
*TN083: Using the Signetics 2651 PCI with Popular Microprocessors
 TN084: Using 7-Segment LED Displays
 TN085: Cyclic Redundancy Check by Software
 TN086: Introducing the Signetics 2655 PPI
 TN087: Audio Cassette Recorder Interfaces
 TN089: CRT Display Using a Standard TV Monitor
 TN092: 2650 Sorting Routines
 TN093: 2650 Binary Floating Point Routines
 TN094: 2650 BCD Floating Point Routines
 TN132: 2656 CP1002 System Memory Interface

* are missing.
