HP-45
| Company type | Public |
|---|---|
| Industry | Electronics, Computer hardware, Calculator manufacturing |
| Founded | January 1, 1939 in Palo Alto, California, United States |
| Founder | Bill Hewlett, Dave Packard |
| Headquarters | Palo Alto , United States |
| Products | Calculators, Computers, Printers, Software |
| Website | www |
The HP-45 represents Hewlett-Packard's second entry into the scientific pocket calculator market, launched in 1973 with a suggested retail price of US$395 (adjusted value ). Building upon the capabilities of the HP-35, it was notable for introducing the innovative use of a shift key to access secondary functions on keys.
Known internally by the codename Wizard, the HP-45 holds the distinction of being the first calculator to carry an official code name. It featured a concealed Easter egg that activated a simple stopwatch function, which was later officially enhanced and incorporated into its 1975 successor, the HP-55.
| Capabilities of the HP-45 | |
|---|---|
| Basic operations | Addition, subtraction, multiplication, division |
| Trigonometric functions | sine and arcsine; cosine and arccosine; tangent and arctangent (supports decimal degrees, radians, grads) |
| Logarithmic functions | Base-10 logarithm and antilogarithm; natural logarithm and exponential function |
| Unit conversions | Conversion between decimal degrees, radians, or grads and degrees–minutes–seconds Transformation between rectangular and polar coordinates Unit conversions: centimeters/inches, kilograms/pounds, liters/gallons |
| Additional features | Reciprocal (1/x), square root, square, exponentiation (y^x), factorial, percentage calculations, percentage change (Δ%) Constants such as Template:Pi, vector and register-based arithmetic Statistical functions including accumulation with mean and standard deviation calculations Display modes supporting fixed point and scientific notation with rounding from 0 to 9 decimal places |
Emulators
Multiple developers and organizations have created software emulators replicating the HP-45 calculator series.
- Nonpareil
- A highly accurate simulator encompassing the HP-45 model, distributed under the GNU General Public License (GPL), compatible with Microsoft Windows.
- HP-45 Emulator
- Java-based emulator licensed under GPL 3, available for devices running Android and Symbian.
- HP-45 Windows Phone 7 App
- An emulator designed for Windows Phone 7 platforms.
- HP-45 Emulator in JavaScript
- Precise emulation achieved by translating the HP-45 Program ROM for use within web browsers.
- HP-45 Emulator in Python
- Detailed simulation of the HP-45’s internal operations, supporting Linux, MacOS, Windows, CP/M systems, and featuring low-power mode options.
Patents
The entire design and firmware of this calculator are protected by patent number .
References