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 Available | PSR-98 | N/A | LCD | ||||
 | SR-59 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (45 program steps) | Conditionals, Branching | 7 numbers | Trigonometrics, Exponentials, Linear regression, Continuous memory, baseN, Unit conversions |
 | SRP-40 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory | |
| No Image Available | SRP-45N | N/A | LCD | (40 program steps) | |||
| No Image Available | SRP-75 | N/A | LCD | Partially merged keystroke (128 program steps) | |||
 | SRP-80 | Scientific | 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 |
 | SRP-145 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory | |
| No Image Available | SRP-145T | N/A | 8+2 LCD digits | (40 program steps) | |||
 | SRP-175 | Scientific | 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 |
 | SRP-265 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory, Constants | |
 | SRP-280 | N/A | 10+2 LCD digits | (74 bytes) | |||
| No Image Available | SRP-285 | N/A | 10+2 LCD digits | (75 bytes) | |||
 | SRP-285II | Scientific | 10+2 LCD digits | Formula programming (152 program steps) | 8 numbers | Trigonometrics, Exponentials, Hyperbolics, Linear regression, Fractions, Complex, Continuous memory, baseN, Constants | |
 | SRP-300 | N/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 |
 | SRP-320G | Graphing | 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 |
 | SRP-400G | Graphing | 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 |
| No Image Available | SRP-320GII | Graphing | 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 |
 | SRP-325G | Graphing | 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 |
| Unconfirmed sighting | SRP-260 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory, Unit conversions, Constants | |
 | SRP-45 | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory | |
| No Image Available | SRP-350 | Scientific | 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 |
 | SRP-45T | Scientific | 10(8+2) LCD digits | Partially merged keystroke (40 program steps) | 3 numbers | Trigonometrics, Exponentials, Hyperbolics, Standard deviation, Continuous memory | |
 | SRP-60 | Scientific | 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 |
