Calculator input methods (English Wikipedia)

Holmes, Neville (2003). "Truth and Clarity in Arithmetic" (PDF). University of Tasmania. Archived (PDF) from the original on 2006-10-07. Retrieved 2023-09-21.

free.fr

pocket.free.fr

The picture of the Casio FX-880P shows sin, cos and tan keys on the second row right hand side.
The picture of the Sharp PC-1245 shows no trigonometric keys

global.sharp

"SHARP". global.sharp.,

haxial.com

Haxial Software Pty Ltd Calculator Product page on the Internet Archived 2009-04-28 at the Wayback Machine; 2001

hp.com

h20331.www2.hp.com

Nelson, Richard J. (April 2012). "HP RPN Evolves" (PDF). HP Solve (27). Hewlett-Packard Development Company, L.P.: 42–45. Archived (PDF) from the original on 2022-10-20. Retrieved 2022-10-20. [1] (4 of 56 pages)
http://h20331.www2.hp.com/Hpsub/downloads/50gUsing_the_EquationWriter_Part2.pdf. Archived 2011-12-18 at the Wayback Machine

h20564.www2.hp.com

"HP Support document - HP Support Center". h20564.www2.hp.com. Archived from the original on 2016-08-26. Retrieved 2016-08-23.

judysapps.com

"Award-Winning Judy's TenKey Accounting Calculator for Windows". www.judysapps.com.

learn2type.com

"Ten Key Certificate on Learn2Type.com!". Learn2Type.com.

loc.gov

lccn.loc.gov

Ball, John A. (1978). Algorithms for RPN calculators (1 ed.). Cambridge, Massachusetts, USA: Wiley-Interscience, John Wiley & Sons, Inc. ISBN 0-471-03070-8. LCCN 77-14977. Retrieved 2023-09-21.

maplesoft.com

"Math Equation Editor - Maple Features - Maplesoft". www.maplesoft.com.

motionnet.com

MotionNET Calculator page on the Internet Archived 2009-05-01 at the Wayback Machine; 2006.

physorg.com

"Professor devises easier calculator". www.physorg.com. United Press International. 2005-06-27. Archived from the original on 2023-01-15. Retrieved 2023-09-20.

psu.edu

citeseerx.ist.psu.edu

Matsushita, Tatsuru (October 1998). "Expressive Power of Declarative Programming Languages" (PhD thesis). Department of Computer Science, University of York. Archived from the original on 2023-09-21. Retrieved 2023-09-21.

ptc.com

Mathcad Archived 2008-09-20 at the Wayback Machine.

sharp-world.com

sharpusa.net

siica.sharpusa.net

"SIICA.sharpusa.com > Resources > More Products > Calculators". siica.sharpusa.net.

techpoweredmath.com

"Texas Instruments releases new OS for TI-84, 2.55 MP". Tech Powered Math. 2011-01-14. Retrieved 2018-05-12.

ti.com

education.ti.com

"Differences Between Algebraic Operating System (AOS) and Equation Operating System (EOS)". Texas Instruments. Retrieved 2022-11-29.
"TI Products | Graphing Calculators | Scientific Calculators". education.ti.com.

ucl.ac.uk

uclic.ucl.ac.uk

Thimbleby, Harold W. (September 1998). "A new calculator and why it is necessary" (PDF). London, UK: Computing Science, Middlesex University. Archived from the original (PDF) on 2007-02-07. Retrieved 2009-05-04.

web.archive.org

MotionNET Calculator page on the Internet Archived 2009-05-01 at the Wayback Machine; 2006.
Haxial Software Pty Ltd Calculator Product page on the Internet Archived 2009-04-28 at the Wayback Machine; 2001
Thimbleby, Harold W. (September 1998). "A new calculator and why it is necessary" (PDF). London, UK: Computing Science, Middlesex University. Archived from the original (PDF) on 2007-02-07. Retrieved 2009-05-04.
Holmes, Neville (2003). "Truth and Clarity in Arithmetic" (PDF). University of Tasmania. Archived (PDF) from the original on 2006-10-07. Retrieved 2023-09-21.
"Professor devises easier calculator". www.physorg.com. United Press International. 2005-06-27. Archived from the original on 2023-01-15. Retrieved 2023-09-20.
Matsushita, Tatsuru (October 1998). "Expressive Power of Declarative Programming Languages" (PhD thesis). Department of Computer Science, University of York. Archived from the original on 2023-09-21. Retrieved 2023-09-21.
Nelson, Richard J. (April 2012). "HP RPN Evolves" (PDF). HP Solve (27). Hewlett-Packard Development Company, L.P.: 42–45. Archived (PDF) from the original on 2022-10-20. Retrieved 2022-10-20. [1] (4 of 56 pages)
Natural Visually Perfect Algebraic Mode (V.P.A.M) - Scientific calculator Archived 2009-04-27 at the Wayback Machine.
"HP Support document - HP Support Center". h20564.www2.hp.com. Archived from the original on 2016-08-26. Retrieved 2016-08-23.
http://h20331.www2.hp.com/Hpsub/downloads/50gUsing_the_EquationWriter_Part2.pdf. Archived 2011-12-18 at the Wayback Machine
Mathcad Archived 2008-09-20 at the Wayback Machine.

wolfram.com

Semantic-Faithful Typesetting.