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+ Mathematics
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Adler 81CS handheld electronic calculator, 1977

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Object statement
Handheld electronic calculator, Adler 81CS, plastic / metal, made by Adler, Germany, 1977
The Significance Statement summarises why an object is important and places it in a social and cultural context. An object may be significant for various reasons, including: historical use, rarity, design/aesthetics, new technology or changes in society. Statement of significance
This object is part of a collection relating to the history and development of calculating devices assembled by Assoc Professor Allan Bromley of Sydney University, comprising of calculators, mechanical and electronic analogue computers, computer components, kit computers, education computers, and associated ephemera.

Allan Bromley was a lecturer and researcher at the University of Sydney Basser Department of Computer Science from 1978 until his untimely death in August 2002. He specialised in Computer Architecture, Computer Logic and in particular the History of Computing. He was regarded as the world authority on Charles Babbage's Calculating Engines (instigating the building of the Difference Engine No.2 at the Science Museum London) and the Ankithera Mechanism and had extensive knowledge of calculators, analogue computers, logic, stereopsis, totalisators, clocks and time keeping and mechanical engineering.
Production Notes include information about the design, manufacture and marketing of an object. Production notes
Adler Business Machines - [TA Vertriebs GmbH, Nurnberg, Germany]
History Notes include facts about what has happened to an object since manufacture. This could include who owned it and how it was used (provenance). It may also describe any cultural meanings with which it may have become associated. History notes
part of the Bromley collection

 This text content licensed under CC BY-NC.

Description
Handheld electronic calculator, Adler 81CS, plastic / metal, made by Adler, Germany, 1977

Handheld electronic calculator in aluminium and black plastic with 9 digit 7-segment LED display under green transparent plastic. There is a row of slide switches for configuring the calculator's function. Below this is a matrix of keys, 5 columns wide and 6 rows deep. The top row has a yellow "C" clear and a black "1/x" key. The second row has five black keys with square root, pi, power (x^n), percent and delta (change in) percent function .The third row has three white numeric keys: "7", "8", "9"; and two black keys for divide and "(-)" functions. Row four has three white numeric keys: "4", "5", "6"; and two black keys for multiply and "Mem out" functions. Row five has three white numeric keys: "1", "2", "3"; and a red key for minus and a black key for "Mem -". The bottom row (row 6) has two white keys for "" and the decimal point, a black "=" key, a blue "+" key and a black "Mem +" key.
Made: 1977
Marks
ADLER 81CS
The Registration Number of an object is a unique identifying number applied by the museum at the point of acquisition. Current numbering format comprises the year of acquisition, followed by a sequential number. For example, '2007/45' is the Registration Number that represents the 45th acquisition in the year 2007. Registration number
2010/1/79
Production date
1977
Height
145 mm
Width
76 mm
Depth
18 mm

 This text content licensed under CC BY-SA.
Acquisition credit line
Donated in memory of Associate Professor Allan Bromley through the Australian Government's Cultural Gifts Program, 2010
Subjects
+ Mathematics
Short persistent URL
Concise link back to this object: http://from.ph/371499
Cite this object in Wikipedia
Copy and paste this wiki-markup:

{{cite web |url=http://from.ph/371499 |title=Adler 81CS handheld electronic calculator |author=Powerhouse Museum |accessdate=19 May 2013 |publisher=Powerhouse Museum, Australia}}


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