HP Models 7123A/B Opt 035 Electronic Chart Integrator Field Training Manual.

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HP Model 7123A/B 10-Inch Strip Chart Recorders Field Training Manual.

HP 17500-90001 Model 17500A Multiple-Span Input Module Oper & Service Manual.

HP 01961-90001 Model 1916A Variable Transition Time Output Oper & Service Manual

HP 06257-90001 1966 Model 6257A DPR Series DC Power Supply Oper & Service Manual

HP 6468-90001 DC Power Supply SCR-10 Series Model 6468A Oper & Service Manual.