“HP-45”的意思、由来-开放百科全书

词条

HP-45

释义

References
Further reading
External links

{{ Infobox Calculator
| name = HP-45
| image = HP-45.jpg
| caption = HP-45
Advanced Scientific Electronic Pocket Calculator.
| type = Scientific
| entry = RPN
| introduced = 1973
| discontinued = 1976
| processor =
| display_type = Red LED seven-segment display
| display_size = 15 digits (decimal point uses one digit), (±10^±99)
| prog_lang =
| memory_data = Four-register operational stack with nine memory registers + LASTx register
| memory_step =
| 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^[1] with an MSRP of $395^[2] ({{Inflation|US|395|1973|fmt=eq}}).{{Inflation-fn|US}} Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.

The calculator was code-named Wizard,^[3] 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.^[4] An accurate version of the stopwatch mode was officially featured in the 1975 successor of the HP-45, the HP-55.

The display of the HP-45 hidden timer showing 00 hours 00 minutes 07 seconds and 58/100 second.

HP-45 functions
Arithmetic	+, −, ×, ÷
Trigonometry	sin, arc sin; cos, arc cos; tan, arc tan (decimal degrees, radians or grads).
Logarithms	log₁₀x, 10^x; log_ex, e^x
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, y^x, n!, %, Δ%, {{pi}}, vector arithmetic, register arithmetic. Statistical accumulation with mean and standard deviation calculations. Fixed point and scientific display modes, 0 – 9 decimal places round-off.

== Emulators ==

Several individuals and companies make software emulators of the HP 45 series calculators.

: //nonpareil.brouhaha.com/'>Nonpareil, high-fidelity simulator for calculators: Emulates, among other, the HP-45. Licensed under the GNU General Public License (GPL). Available for Microsoft Windows.

[https: //web.archive.org/web/20120405051955/http://my.opera.com/HP-45/about HP-45 Emulator]: HP-45 Emulator written in Java. Licensed under the GPL 3. Available for Android ^[5] and Symbian.^[6]

: //www.windowsphone.com/de-AT/apps/03067e72-5b02-e011-9264-00237de2db9e'>HP-45 Windows Phone 7 App{{Dead link|date=January 2019}} : An Emulator for Windows Phone 7.

: //members.aon.at/nkehrer/hp45_js/hp45.html'>HP-45 Emulator in JavaScript: The HP-45 Program ROM was translated to JavaScript to have an exact simulation of the original calculator for use in web browsers.

References

1. ^{{cite web |url=http://www.hp.com/hpinfo/abouthp/histnfacts/museum/personalsystems/0040/index.html |title=HP Virtual Museum: Hewlett-Packard-45 advanced scientific pocket calculator, 1973 |accessdate=2017-10-15}}
2. ^{{Cite web |url={{Google books|1T4ORu6EICkC|page=124|plainurl=yes}} |title=Those incredible new scientific pocket calculators |last=Free |first=John R. |page=124 |magazine=Popular Science |date=April 1974 |accessdate=2017-10-15}}
3. ^HP Calculator History – The HP-45
4. ^HP-45 Calculator as a Stopwatch
5. ^[https://market.android.com/details?id=net.sourceforge.uiq3.hp45 Android]
6. ^Symbian

External links

http://www.hpmuseum.org/hp45.htm
http://www.digibarn.com/collections/calculators/hp45/index.html
http://www.xnumber.com/xnumber/WMJ_hp45.htm

1 : HP calculators

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

References

Further reading

External links