Item ST 36679 Calculator - Hewlett Packard, Model 9100A, Electronic, USA, 1969

Summary

Hewlett Packard model 9100A computing calculator, with model 9120A printer and model 9160A marked card reader. Made in United States of America in 1969 and purchased that year for $4290. The 9100A is a desktop programmable calculator with cathode ray tube display, it contains 3 display registers, 16 storage registers and a total of 2208 memory bits. Programs (up to 196 steps) are stored on magnetic cards. Printer uses electrostatic printing.

The Hewlett-Packard Journal in September 1968 described the calculator as: 'the 9100A is a programmable, electronic calculator which performs operations commonly encountered in scientific and engineering problems. Its log and trig functions are each performed with a single key stroke, providing fast, convenient solutions to intricate equations. Computer-like memory enables the calculator to store instructions and constants for iterative solutions. The easily-readable cathode ray tube instantly displays entries, answers and, when desired, intermediate results.'

Physical Description

Computing Calculator: Beige metal unit with rounded edges with grey and brown keyboard and digital screen at front, plastic feet on base and plug connections at rear. There are pull-out instuction on a panel at the front. It has been labelled with black Dynamo labels. Printer unit is physcially attached at top. It has a light grey plastic cover with white edging. Printer: Curved beige plastic unit with dark grey buttons at front, paper reel (with paper) on top and connection cords at rear. Two cracks on right hand side of rear of unit. It has been labelled with black Dynamo labels. Physically attached to top of calculator unit. Marked Card Reader: Rectangular metal unit painted beige with plastic feet on base and sloping silver tray on top. There is a grey connector cord at the back of the unit. It has been labelled with black and green Dynamo labels. There are two beige plastic cassettes for Program Cards.