From: The Museum of HP Calculators

HP-25 Scientific Calculator

Market Years: 1975-1978

Original Price: $195. The price was reduced to $145 when the continuous memory HP-25C was introduced.

HP-25 Calculator Simulation

These programs are not Hewlett-Packard products and are supplied without representation or warranty of any kind. The authors and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of these programs or any part thereof.

This fantastic Java simulation was written by Larry Leinweber and donated to the museum.

To work the calculator, press the keys by clicking with the mouse and slide the switches by dragging.
The calculator should behave exactly like a real HP-25 except for computational accuracy. (This simulation computes to about 17 digits and trig functions for very large angles are always taken as zero.) The calculator is programmable and if you turn it off, you'll see that it's not an HP-25C.
Because the slanted face legends can be hard to read, if you leave the mouse over a slide switch or key for one second, a hint will appear in square brackets on the title bar of the window.
The applet code is public domain.

Java capable browser required <<< When the R/S button appears, click to start the applet window. (This may take awhile by modem as there are 130K bytes to download.)

Programming Information