HP 61010A Owner's Manual page 6

Chapter 4 - Front Panel Connections
Explains how to connect the Digital I/O to your
application.
Chapter 5 - Programming With BASIC
Describes how to control the Digital I/O with a
program. All programming statements for the Digital
I/O are explained. Simple programming examples are
also included.
Appendix A - Programming Statement Summary
Lists all programming statements that apply to the
Digital I/O.
Appendix B - Verification Procedures
Describes verification procedures that you can use to
verify the proper operation of the Digital I/O if you
suspect an instrument malfunction.
Appendix C - Error Messages
Lists all error messages that apply to the Digital I/O.
Appendix D - HP 14802A Terminal Block Connections
Describes the optional Terminal Block and identifies all
screw terminal assignments.