Advanced Scientific Electronic Pocket Calculator.
|Display type||Red LED seven-segment display|
|Display size||15 digits (decimal point uses one digit), (±10±99)|
|Memory register||Four-register operational stack with nine memory registers + LASTx register|
|Power supply||Internal rechargeable battery or 115/230 V AC, 5 W|
|Weight||Calculator: 9 oz (255 g),|
recharger: 5 oz (140 g)
|Dimensions||Length: 5.8 in (147 mm),|
width: 3.2 in (81 mm),
height: 0.7 in (18 mm) – 1.3 in (33 mm)
The HP-45 was the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 with an MSRP of $395 (equivalent to $2,229 in 2018). Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.
The calculator was code-named Wizard, which is the first known use of a code name for a calculator.
It also contained an Easter egg that allowed users to access a not-especially accurate stopwatch mode. An accurate version of the stopwatch mode was officially featured in the 1975 successor of the HP-45, the HP-55.
|Arithmetic||+, −, ×, ÷|
|Trigonometry||sin, arc sin; cos, arc cos; tan, arc tan (decimal degrees, radians or grads).|
|Logarithms||log10x, 10x; logex, ex|
|Conversions||Decimal degrees, radians or grads ↔ degrees–min.–sec.|
Rectangular coordinates ↔ polar coordinates.
Conversion units: cm/in, kg/lb, ltr/gal
|Other||1/x, √x, x2, yx, n!, %, Δ%, π, vector arithmetic, register arithmetic.|
Statistical accumulation with mean and standard deviation calculations.
Fixed point and scientific display modes, 0 – 9 decimal places round-off.
Several individuals and companies make software emulators of the HP 45 series calculators.
- Nonpareil, high-fidelity simulator for calculators
- Emulates, among other, the HP-45. Licensed under the GNU General Public License (GPL). Available for Microsoft Windows.
- HP-45 Emulator
- HP-45 Emulator written in Java. Licensed under the GPL 3. Available for Android  and Symbian.
- HP-45 Windows Phone 7 App[dead link]
- An Emulator for Windows Phone 7.
- "HP Virtual Museum: Hewlett-Packard-45 advanced scientific pocket calculator, 1973". Retrieved 2017-10-15.
- Free, John R. (April 1974). "Those incredible new scientific pocket calculators". Popular Science. p. 124. Retrieved 2017-10-15.
- Federal Reserve Bank of Minneapolis Community Development Project. "Consumer Price Index (estimate) 1800–". Federal Reserve Bank of Minneapolis. Retrieved January 2, 2019.
- HP Calculator History – The HP-45
- HP-45 Calculator as a Stopwatch
- https://www.google.com/patents/US3892958 Inverse/complementary function prefix key, patent US3892958A