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Programmable calculatorsCitizen Programmables
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With the large number of recent models they introduced, not to mention that one of their models (well, technically that's not correct: these new "Citizen" machines are, in fact, manufactured by Kinpo, but then again, even on Kinpo's Web site, the photos show calculators with the Citizen logo) was picked up by Hewlett Packard for an OEM calculator, the Citizen brand now deserves its own Web page. It also happens to be a perfect opportunity for me to introduce dynamically generated manufacturer pages; much of the information you see on this page is generated "on the fly" from a MySQL database.

Keystroke Programmables

The first Citizen calculators I encountered are from the late 1980's. They were simple OEM scientifics with minimal programmability. Recently, however, Citizen introduced a number of advanced scientific programmables into its product line, machines with unique features and design.

Classic Citizens
Best known for watches, the Citizen brand name was also used for other electronic products, including a small lineup programmable calculators, mostly marketed in the Far East. These were primarly OEM machines, some looking suspiciously similar to certain Canon models.
- Model Type Display Programming model Programming features Memory Special functions
No Image AvailablePSR-98N/A  LCD          
Citizen SR-59SR-59Scientific  10(8+2) LCD digits  Partially merged keystroke (45 program steps)  Conditionals, Branching  7 numbers  Trigonometrics, Exponentials, Linear regression, Continuous memory, baseN, Unit conversions 
Citizen SRP-40SRP-40Scientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory 
No Image AvailableSRP-45NN/A  LCD   (40 program steps)       
No Image AvailableSRP-75N/A  LCD   Partially merged keystroke (128 program steps)       
Citizen SRP-80SRP-80Scientific  10+2 LCD digits  Partially merged keystroke (128 program steps)  Conditionals, Branching  10 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Fractions, Complex, Continuous memory, baseN, Unit conversions, Constants 
Citizen SRP-145SRP-145Scientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory 
No Image AvailableSRP-145TN/A  8+2 LCD digits  (40 program steps)       
Citizen SRP-175SRP-175Scientific  10+2 LCD digits  Partially merged keystroke (128 program steps)  Conditionals, Branching  10 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Fractions, Complex, Continuous memory, baseN, Unit conversions, Constants 

 

A New Lineup
Recently, the Citizen brand name re-emerged with a very strong product line of nicely designed, quality scientific and programmable calculators. Sold apparently mainly in Europe and the Far East, these machines rapidly gain popularity due to their low cost and pleasing appearance. Even classic manufacturers take notice: Hewlett-Packard has opted to sell a Citizen calculator under its own brand name.
- Model Type Display Programming model Programming features Memory Special functions
Citizen SRP-265SRP-265Scientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory, Constants 
Citizen SRP-280SRP-280N/A  10+2 LCD digits  (74 bytes)       
No Image AvailableSRP-285N/A  10+2 LCD digits  (75 bytes)       
Citizen SRP-285IISRP-285IIScientific  10+2 LCD digits  Formula programming (152 program steps)    8 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Fractions, Complex, Continuous memory, baseN, Constants 
Citizen SRP-300SRP-300N/A  10+2 LCD digits  (148 bytes)       

Graphing Calculators

An Exclusive Club
Not only does Citizen produce scientific programmables, the brand also became one of the very few with its own distinct line of graphing calculators.
- Model Type Display Programming model Programming features Memory Special functions
Citizen SRP-320GSRP-320GGraphing  35×23 LCD pixels  Formula programming (400 program steps)  Conditionals, Branching, Subroutines, Labels, Indirect addressing  26 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Graphing, Fractions, Continuous memory, baseN 
Citizen SRP-400GSRP-400GGraphing  64×32 LCD pixels  Formula programming (30000 bytes)  Conditionals, Branching, Subroutines, Labels  28 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Graphing, Integration, Fractions, Complex, Continuous memory, baseN, Unit conversions, Constants 

Other Models

Citizen models that were not yet added to any of the categories listed so far are shown below.
- Model Type Display Programming model Programming features Memory Special functions
Unconfirmed sightingSRP-260Scientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory, Unit conversions, Constants 
No Image AvailableSRP-320GIIGraphing  LCD pixels  Formula programming (400 program steps)  Conditionals, Branching, Subroutines, Labels  26 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Graphing, Fractions, Continuous memory, baseN, Unit conversions, Constants 
Citizen SRP-325GSRP-325GGraphing  35×23 LCD pixels  Formula programming (400 program steps)  Conditionals, Branching, Subroutines, Labels  26 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Graphing, Fractions, Continuous memory, baseN 
No Image AvailableSRP-350Scientific  2× LCD characters  Formula programming (1200 bytes)  Conditionals, Branching, Subroutines, Labels  1200(0) bytes  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Fractions, Continuous memory, baseN, Unit conversions, Constants 
Citizen SRP-45SRP-45Scientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory 
Citizen SRP-45TSRP-45TScientific  10(8+2) LCD digits  Partially merged keystroke (40 program steps)    3 numbers  Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory 
Citizen SRP-60SRP-60Scientific  10(8+2) LCD digits  Partially merged keystroke (45 program steps)  Conditionals, Branching  7 numbers  Trigonometrics, Exponentials, Hyperbolics, Linear regression, Continuous memory, baseN, Unit conversions