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A Big database for small calculators.

Last database update :
04-21-2014


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Keystone  390   (no picture)
 

 
Introduction date<=1973
End date>=1973
Type4 funct
Last update date2009_04_13
ProgrammableN
RAM size1
ROM size
Number of functions5+2mem
Alpha capabilitiesN
Number of keys20
Display typePanaplex
Number of digits on display8
Graphical (X x Y)N
Extention(s)N
PrinterN
SavingN
Date or clock capabilitiesN
Microprocessor
Functions list% MR MC
Size (length x width x thickness)133x81x?
Weight
Batteries4xAA sealed
External power10V6AC
Power consumption
Twin
Made in
Link(s)

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Copyright : all the pictures are my property. You can copy and save them but strictly for your own purpose. You are not authorized to modify, diffuse or use them (even partially) for another internet site, or for all other puplic diffusion. You are authorized to create links to MyCalcDB site, but I cannot garantee their reliability in the time. What I can garantee (exept errors) is only the database calculator's id number (for example: id=777 for the HP-55).