|
HP-35
The HP-35 was Hewlett-Packard's first pocket calculator and the world's first ''scientific'' pocket calculator: a calculator with trigonometric and exponential functions. It was introduced in 1972. History In about 1970 HP co-founder Bill Hewlett challenged his co-workers to create a "shirt-pocket sized HP-9100". At the time, slide rules were the only practical portable devices for performing trigonometric and exponential functions, as existing pocket calculators could only perform addition, subtraction, multiplication, and division. Introduced at , like HP's first scientific calculator, the desktop 9100A, it used reverse Polish notation (RPN) rather than what came to be called "algebraic" entry. The "35" in the calculator's name came from the number of keys. The original HP-35 was available from 1972 to 1975. In 2007 HP announced the release of the "retro"-look HP 35s to commemorate the 35th anniversary of the launch of the original HP-35. It was priced at . The HP-35 was na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France Rode
France Rode (November 20, 1934 – June 7, 2017) was a Slovenian engineer and inventor best known for his work on the HP-35 pocket calculator.HP-35 He was one of the four lead engineers at Hewlett-Packard assigned to this project. Rode also invented and created the first workable RFID products: workplace entry cards, for which he held several patents. Early life France was born in Nožice, Slovenia on November 20, 1934 to farmers father Jože and mother Pepca, born Prešeren, as the oldest of four children. His younger sister Agata and brothers Marko and Aleš completed the family. France started elementary school education in nearby Homec soon after the German occupation of Slovenia during the Second World War. A few months into the first school year the local Partisans burned the school building and the children were prevented from attending formal schooling for the duration of the war. After the war, until the school in Homec was rebuilt, France’s class met in the local ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP 35s
The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator). HP also released a limited production anniversary edition with shiny black overlay and engraving "Celebrating 35 years". Features The HP 35s uses either Reverse Polish Notation (RPN) or algebraic infix notation as input. Other features of the HP 35s include: * Two-line alphanumeric LCD * Over 800 memory registers (26 directly labelled) * Scientific and statistical functions * Operation in decimal, binary, octal, hexadecimal * Equation solver with arbitrary variable isolation (first seen on the HP-18C) * Numerical integration (first seen on the HP-34C) * Support for input and display of fractions * Complex number and vector calculations * Unit conversions and table ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pocket Calculator
An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state electronic calculator was created in the early 1960s. Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator company Busicom. Modern electronic calculators vary from cheap, give-away, credit-card-sized models to sturdy desktop models with built-in printers. They became popular in the mid-1970s as the incorporation of integrated circuits reduced their size and cost. By the end of that decade, prices had dropped to the point where a basic calculator was affordable to most and they became common in schools. Computer operating systems as far back as early Unix have included interactive calculator programs such as dc and hoc, and interactive BASIC could be used to do calculations on most 1970s and 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Calculator
A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform mathematical operations. They have completely replaced slide rules and are used in both educational and professional settings. In some areas of study scientific calculators have been replaced by graphing calculators and financial calculators which have the capabilities of a scientific calculator along with the capability to graph input data. Functions When scientific calculators were originally marketed they normally had only four of five capabilities (addition, subtraction, multiplication, division and square root). Modern scientific calculators generally have many more capabilities than the original four or five function calculator, and the capabilities differ between manufacturers and models. The capabilities of a modern scientific calculator include: * scientific notation * floating-point decimal arithmetic * logarithmic functions, using both base 10 and base e * t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reverse Polish Notation
Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators ''follow'' their operands, in contrast to Polish notation (PN), in which operators ''precede'' their operands. It does not need any parentheses as long as each operator has a fixed number of operands. The description "Polish" refers to the nationality of logician Jan Łukasiewicz, who invented Polish notation in 1924. The first computer to use postfix notation, though it long remained essentially unknown outside of Germany, was Konrad Zuse's Z3 in 1941 as well as his Z4 in 1945. The reverse Polish scheme was again proposed in 1954 by Arthur Burks, Don Warren, and Jesse Wright and was independently reinvented by Friedrich L. Bauer and Edsger W. Dijkstra in the early 1960s to reduce computer memory access and use the stack to evaluate expressions. The algorithms and notation for this scheme were extended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Notation
Scientific notation is a way of expressing numbers that are too large or too small (usually would result in a long string of digits) to be conveniently written in decimal form. It may be referred to as scientific form or standard index form, or standard form in the United Kingdom. This base ten notation is commonly used by scientists, mathematicians, and engineers, in part because it can simplify certain arithmetic operations. On scientific calculators it is usually known as "SCI" display mode. In scientific notation, nonzero numbers are written in the form or ''m'' times ten raised to the power of ''n'', where ''n'' is an integer, and the coefficient ''m'' is a nonzero real number (usually between 1 and 10 in absolute value, and nearly always written as a terminating decimal). The integer ''n'' is called the exponent and the real number ''m'' is called the '' significand'' or ''mantissa''. The term "mantissa" can be ambiguous where logarithms are involved, because it is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of IEEE Milestones
The following timeline tables list the discoveries and inventions in the history of electrical and electronic engineering. History of discoveries timeline History of associated inventions timeline List of IEEE Milestones The following list of the Institute of Electrical and Electronics Engineers (IEEE) milestones represent key historical achievements in electrical and electronic engineering. Prior to 1870 *1745–1746 – Leyden jar capacitor by Ewald Georg von Kleist and Pieter van Musschenbroek * 1751 – Book '' Experiments and Observations on Electricity'' by Benjamin Franklin * 1757–1775 – Benjamin Franklin's Work in London * 1799 – Alessandro Volta's Electrical Battery Invention * 1836 – Nicholas Callan's Pioneering Contributions to Electrical Science and Technology * 1828–1837 – Pavel Schilling's Pioneering Contribution to Practical Telegraphy * 1838 – Demonstration of Practical Telegraphy * 1852 – Electric Fire Alarm System * 1857 – Heinrich Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hewlett-Packard 9100A
The Hewlett-Packard 9100A (hp 9100A) is an early programmable calculator (or computer), first appearing in 1968. HP called it a desktop calculator because, as Bill Hewlett said, "If we had called it a computer, it would have been rejected by our customers' computer gurus because it didn't look like an IBM. We therefore decided to call it a calculator, and all such nonsense disappeared." An ad for the 9100A in 1968 ''Science'' magazine contains one of the earliest documented use (as of 2000) of the phrase personal computer. History The unit was descended from a prototype produced by engineer Thomas "Tom" E. Osborne, who joined the company when HP decided to adopt the project. An engineering triumph at the time, the logic circuit was produced without any integrated circuits, the assembly of the CPU having been entirely executed in discrete components. With CRT readout, magnetic card storage, and printer, the price was around . The 9100A was the first scientific ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slide Rule
The slide rule is a mechanical analog computer which is used primarily for multiplication and division, and for functions such as exponents, roots, logarithms, and trigonometry. It is not typically designed for addition or subtraction, which is usually performed using other methods. Maximum accuracy for standard linear slide rules is about three decimal significant digits, while scientific notation is used to keep track of the order of magnitude of results. Slide rules exist in a diverse range of styles and generally appear in a linear, circular or cylindrical form, with slide rule scales inscribed with standardized Graduation (instrument), graduated markings. Slide rules manufactured for specialized fields such as aviation or finance typically feature additional scales that aid in specialized calculations particular to those fields. The slide rule is closely related to nomograms used for application-specific computations. Though similar in name and appearance to a standard ruler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP-9100
The Hewlett-Packard 9100A (hp 9100A) is an early programmable calculator (or computer), first appearing in 1968. HP called it a desktop calculator because, as Bill Hewlett said, "If we had called it a computer, it would have been rejected by our customers' computer gurus because it didn't look like an IBM. We therefore decided to call it a calculator, and all such nonsense disappeared." An ad for the 9100A in 1968 ''Science'' magazine contains one of the earliest documented use (as of 2000) of the phrase personal computer. History The unit was descended from a prototype produced by engineer Thomas "Tom" E. Osborne, who joined the company when HP decided to adopt the project. An engineering triumph at the time, the logic circuit was produced without any integrated circuits, the assembly of the CPU having been entirely executed in discrete components. With CRT readout, magnetic card storage, and printer, the price was around . The 9100A was the first scientific cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP-45
The HP-45 is 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 US$395 (). 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. The display of the HP-45 hidden timer showing 00 hours 00 minutes 07 seconds and 58/100 second. Emulators 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-4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hewlett-Packard
The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components, as well as software and related services to consumers, small and medium-sized businesses ( SMBs), and large enterprises, including customers in the government, health, and education sectors. The company was founded in a one-car garage in Palo Alto by Bill Hewlett and David Packard in 1939, and initially produced a line of electronic test and measurement equipment. The HP Garage at 367 Addison Avenue is now designated an official California Historical Landmark, and is marked with a plaque calling it the "Birthplace of 'Silicon Valley'". The company won its first big contract in 1938 to provide test and measurement instruments for Walt Disney's production of the animated film ''Fantasia'', which allowed Hewlett and Packard to formally esta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
