Hewlett-Packard HP-45 Handheld Electronic Calculator
date: label: date made
content: 1973
name: label: maker
content: Hewlett-Packard Company
notes: label: Description
content: The HP-45, the successor to Hewlett-Packard’s HP-35 calculator, was also designed for scientific calculations. It has a black plastic case. Like the HP-35, it has a total of thirty-five square or rectangular plastic keys. These include ten digit keys, a decimal point key, and a summation key, all colored light gray. The four arithmetic function keys are left of the digit keys. Immediately above the digit keys are a relatively long enter key, a change sign key, an enter exponent key, and a clear x key. Above these are keys for exchange, roll down, store, recall, and percentage. Above these is a row of keys for squares, conversion to polar coordinates, and trigonometric functions. The top row of function keys is for inverses, logarithms, exponents, and fixing the output as decimal (rather than scientific) notation. A gold shift key in the upper left corner shifts the meaning of many of the keys to functions indicated in gold. In the bottom row, for example, the key for 0 becomes a key that shows the last value of x, the key for the decimal point becomes the number pi, and the key for summation becomes a key for decrement summation.
label: Description
content: Behind the keyboard are an on/off switch and a fifteen-character red LED display. This shows the mantissa sign, a ten-digit mantissa, a decimal point, the exponent sign and a two-digit exponent.
label: Description
content: A mark on the front edge of the calculator reads: hp HEWLETT•PACKARD 45.
label: Description
content: The back of the calculator has a plug for a three-prong power adapter, a sticker reading: PROPERTY OF (/) HAL B. BECKER, a compartment for a battery pack and four rubber feet. Another sticker reads: HEWLETT-PACKARD HP-45 INSTRUCTIONS. Text below the sticker reads: HEWLETT-PACKARD (/) 3.75V 500MW (/) MADE IN USA PATENT PENDING. A sticker inside the battery pack reads: HEWLETT-PACKARD (/) SER.NO. 1349A 37972. The letter A in the serial number indicates the calculator was made in the United States. The first four digits of the serial number suggest it was made in the forty-ninth week of 1973.
label: Description
content: Like the HP-35, the HP-45 performed calculations using reverse Polish notation.
label: Description
content: Stored with the calculator are a power adopter (2004.3053.02) a leather case (2004.3053.03), an owner’s manual (2004.3053.06), a quick reference guide (2004.3053.05), and an envelope with warranty, payment check, and receipt (2004.3053.07). These all fit in a gray molded plastic case (2004.3053.04).
label: Description
content: The HP-45 calculator sold from 1973 until 1975. This example was purchased in December of 1973 for $410 (including shipping).
label: Description
content: The donor, Hal Becker of Phoenix, purchased this calculator while working on computer data communication systems with Honeywell.
label: Description
content: References:
label: Description
content: W.A.C. Mier-Jedrzejowicz, <I>A Guide to HP Handheld Calculators and Computers </I>, Tustin, California: Wilson/Burnett Publishing, 1997, pp. 41–42, 123
label: Description
content: David G. Hicks, <I>The Museum of HP Calculators</I>, http://www.hpmuseum.org/, accessed July, 2014.
label: Description
content: Accession file.
label: Location
content: Currently not on view
place: label: place made
content: United States
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
label: See more items in
content: Handheld Electronic Calculators
creditLine: label: Credit Line
content: Gift of Hal Byron Becker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2004.3053.01
label: nonaccession number
content: 2004.3053
label: catalog number
content: 2004.3053.01
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: plastic (keys; case; display cover material)
label: Physical Description
content: metal (circuitry material)
label: Physical Description
content: ceramic (display circuit board material)
label: Physical Description
content: paper (stickers material)
label: Measurements
content: overall: 1 1/4 in x 3 in x 5 5/8 in; 3.175 cm x 7.62 cm x 14.2875 cm