Hewlett-Packard HP-55 Scientific programmable calculator

General specifications
Type Scientific programmable calculator
Production years 1975 - 1977
New price USD 395.00
Operating system n.a.
Chipset/CPU -
I/O -
Performance index 1
Arithmetics
Entry method Reverse Polish Notation
Precision 10 digits
Advanced functions













Forensic result -
Features
 









Scientific programmable calculator: Hewlett-Packard HP-55
Programming
Programming model Keystroke entry
Programming features




Program display Keycode
Program editing Overwrite capability
Memory
Programming 49
Data 20 numbers
Secondary
ROM
Functions + - × ÷
Display
Type LED
Size 10+2 digits
Dimensions
L×W×H 152×76×38 mm
Weight 340 g
Power
Batteries 3×NiCd AA
External power HP-82002 adapter
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Description


The HP-55 is a cheaper version of the HP-65. But to make it sell, HP engineers added a quartz clock to the device, making it the first ever calculator with a real-time clock.

Image


Scientific programmable calculator: Hewlett-Packard HP-55



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This page was last modified on September 10th, 2008

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2 Responses so far

I got it ;)
tnx dad
madmeth
January 17th, 2010
I still have my HP-55 from my days with NASA. It is no longer operable due to inability to locate the 82001A battery pack. I also no longer have the external power adapter; but I'm still looking.
Jesse Callahan
June 19th, 2009