HP-45
Encyclopedia
The HP-45 was the second scientific calculator
introduced by Hewlett-Packard
, adding to the features of the HP-35
. Especially noteworthy was its pioneering addition of a shift key
that gave the 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.
Scientific calculator
A scientific calculator is a type of electronic calculator, usually but not always handheld, designed to calculate problems in science, engineering, and mathematics...
introduced by Hewlett-Packard
Hewlett-Packard
Hewlett-Packard Company or HP is an American multinational information technology corporation headquartered in Palo Alto, California, USA that provides products, technologies, softwares, solutions and services to consumers, small- and medium-sized businesses and large enterprises, including...
, adding to the features of the HP-35
HP-35
The HP-35 was Hewlett-Packard's first pocket calculator and the world's first scientific pocket calculator . Like some of HP's desktop calculators it used reverse Polish notation. Introduced at US$395, the HP-35 was available from 1972 to 1975.Market studies at the time had shown no market for...
. Especially noteworthy was its pioneering addition of a shift key
Shift key
The shift key is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below the home row...
that gave the 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
Easter egg
Easter eggs are special eggs that are often given to celebrate Easter or springtime.The oldest tradition is to use dyed or painted chicken eggs, but a modern custom is to substitute chocolate eggs, or plastic eggs filled with confectionery such as jelly beans...
that allowed users to access a not-especially accurate stopwatch
Stopwatch
A stopwatch is a handheld timepiece designed to measure the amount of time elapsed from a particular time when activated to when the piece is deactivated. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stopclock.The timing functions...
mode.
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