Hewlett-Packard HP-28C Handheld Electronic Calculator
date: label: date made
content: 1987
name: label: maker
content: Hewlett-Packard Company
notes: label: Description
content: This advanced scientific calculator, to use the maker's phrase, was the first graphing handheld electronic calculator made by Hewlett-Packard. It also was the first HP calculator using algebraic expressions and the first to allow integration and differentiation. It was introduced in 1987 and sold into early 1988.
label: Description
content: The object has a black plastic case hinged along the left edge. Opening it reveals a double keyboard. Thirty-five sloping rectangular keys are on the left side and another thirty-seven on the right. Keys on the left side have letters and symbols; keys on the right include digits, symbols for arithmetic operations, and symbols associated with trigonometry, statistics, plotting, integration, and differentiation.
label: Description
content: Above the keyboard on the left is a list of object types (e.g. complex number), symbols used to designate that type (e.g. parenthesis for complex numbers) and examples (e.g. (123.45, 678.90) for the complex number 123.45 + 678.90i). The display on the right side shows four rows of text, indicating what number or command is stored in each of four stacks. The display also can be using to show the graph of functions. A mark above it reads: hp HEWLETT (/) PACKARD 28C.
label: Description
content: The battery cover is on the right side. A mark on the back reads: COMPLIES WITH THE LIMITS FOR A CLASS B (/) COMPUTING DEVICE PURSUANT TO SUBPART (/) J OF PART 15OF ICC RULES (/) ATI confrome classe B 2729A04383 (/) MADE IN USA. The serial number indicates the device was made in the 29th week of 1987.
label: Description
content: Programming for the calculator – both internally and by users – was in a programming language known as RPL (Reverse Polish Lisp or ROM-based Procedural Language), a variation on the programming language LISP.
label: Description
content: For related documentation, see 1999.0291.02. For an example of the closely related calculator that succeeded it, the HP-28S, see 2012.0063.01. The HP28-C sold for $235.
label: Description
content: This HP28C was used by Professor Norton Starr, who taught mathematics at Amherst College in Massachusetts.
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. 84–87, 133.
label: Description
content: David G. Hicks, <I>The Museum of HP Calculators</I>, http://www.hpmuseum.org/, accessed July, 2014.
label: Description
content: Yves Nievergelt, “The Chip with the College Education: the HP-28C,” <I>The American Mathematical Monthly</I>, vol. 94, # 9, November 1987, pp. 895–902.
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 Norton Starr
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1999.0291.01
label: accession number
content: 1999.0291
label: catalog number
content: 1999.0291.01
objectType: label: Object Name
content: electronic calculator, graphing
physicalDescription: label: Physical Description
content: plastic (case; keys; display cover; hinge material)
label: Physical Description
content: metal (circuitry material)
label: Measurements
content: overall: 2 cm x 9.5 cm x 15.9 cm; 25/32 in x 3 3/4 in x 6 1/4 in