Posts Tagged ‘HP business calculator’

The History of HP Calculators

Thursday, December 8th, 2011

Hewlett-Packard started making calculators in the late 1960’s. Given the company’s knowledge on technology, they saw an opportunity to replace slide rules and adding machines. With this goal in mind, they invented a desktop scientific calculator that included powerful capabilities that handled trigonometric functions, exponentiation, square roots, logarithms and floating-point numbers. The HP scientific calculator’s success became the start of a series of calculators with varying capabilities from the company.

Here is a brief history of HP calculators that changed the way people compute for complex equations.

HP 9100 (1968)

This is the first HP scientific calculator and it was introduced in 1968. It was made with a printed circuit board ROM, magnetic core memory, a CRT display, and weighed around 40 pounds. This calculator performed different functions like logarithmic, square root, trigonometric, vector addition/subtraction, polar/rectangular conversion, floating-point numbers and a logic system that handles complex expressions (RPN). It also had a magnetic card reader/writer and options to print or plot.

There are two versions of this model, the HP 9100A and HP 9100B. Shortly after the HP 9100A’s release, the HP 9100B came out with added features like a maximum of 32 storage registers and 392 program step (the 9100A had maximums of 16 storage registers and 196 programs steps). The HP 9100B also had a dual program display, a key to recall numbered registers into X, and subroutines.

HP’s entry product to the electronic calculator market performs beyond simple computations and its success convinced Bill Hewlett to create something of the same power but costs less, weighs less, and something that can fit into a pocket.

HP-35 (1972)

The realization of Bill Hewlett’s vision to create a pocket-sized calculator is the HP-35. It was introduced in 1972 as the first pocket handheld calculator that performed more than the four basic functions. This is the first handheld HP calculator that performed trigonometric and logarithmic functions with a keystroke, and was known for having the x^y key instead of the y^x. It was originally developed for internal use to make engineers’ jobs easier before they introduced it to the market and sold hundreds of thousands.

HP-80 (1973)

This is the second handheld calculator and the first HP business calculator. Introduced in 1973, it was designed to solve problems that did not require the users to know the formulas, ideal for finance rather than scientific/engineering functions. Compared to the HP-35, the users supplied the formulas on the HP- 35 whereas the HP-80 supplied the formulas for the users. This calculator had date arithmetic, bond and depreciation calculations, statistic functions, and control of the display mode. It was the first calculator from HP to have a shift key and it added 11 other functions in this model. The x^y functions of the HP-35 were replaced with y^x and had the STO and RCL buttons to allow users to store and recall numbers to and from registers.  Except for their functions, the HP-35 and HP-80 are similar in construction, batteries, and dimensions.

HP-65 (1974)

This was introduced in 1974 as the fourth handheld calculator and first pocket programmable model from HP. It had new functions for programming and had a built-in device for reading and writing magnetic cards so that users can save programs on cards. It was dubbed as “The Personal Computer” and it used label addressing and had 100 lines of space. It was the first HP pocket calculator with base conversions (octal and decimal), and the first to perform degress.minutes seconds arithmetic.

HP-27 (1976)

This was HP’s first “Do Everything” pocket calculator because it performed different functions for math, statistics, scientific, and business. In addition to the usual statistical functions, this model added computation of variance and normal distribution parameters. It was ideal for business users who needed technical functions and for technical users who needed business functions, without the need for programmability.

Within just a decade of entering the electronic calculator market, HP already made a number of calculators for different computing needs. HP calculators evolved from basic computing to scientific/technical and financial/business computing. Today, HP continues to provide us with calculators to help us with our daily computing needs.


The Models and Families of HP Calculators from 1972 to 1986

Wednesday, December 7th, 2011

HP released their first few handheld calculators with model numbers like the HP-35 and HP-80. These models looked the same but had different features as one is a technical calculator and the other is a business calculator. It did not take long before other HP calculators were released. There were models that came out like their small desktop calculator with built-in printer and the smaller handhelds. HP was expanding their calculator production until there were too many models to remember. To make it convenient and easy to remember, HP decided to classify their calculators into a “family” or a series.

Here are the Families and Series Names of different HP calculator models:

The Classics

This family consists of the first few handheld calculators like the HP-35 which is the first handheld HP scientific calculator. Then there is the HP-80 (first HP business calculator), HP-65 (first programmable handheld), HP-45, HP-70, and HP-55.

Classic Printers (Printing Desktop Calculators)

This family consists of desktop calculators with built-in printers. The HP calculator models under this series are the HP-46 and HP-81. These two models are the printing versions of the HP-45 and HP-80. The HP-81 was considered a top-of-the-line desktop printing calculator because HP added more functions to it.

Woodstock (Second Generation Handheld Calculators)

This family consists of the second generation series of handheld HP calculators like the HP-21 (second generation HP-35) HP-22, HP-25, HP-25C (HP-25 with continuous memory), HP-27 (the “Do Everyting” model with sci/stat/bus/math functions), and HP-29C (high end programmable).

Topcat (Second Generation Desktop Calculator)

This family consists of top-of-the-line HP desktop calculator models HP-91, HP-92, Hp-97, and HP-97S. These calculators are also known as the 90’s series. This family has a printing scientific calculator, printing business/financial calculator, and I/O calculator.

Spice (Third Generation HP Calculators)

This family is also known as the 30E/C series because the models included in this line of HP calculators are the HP-31E, HP-32E, HP-33E/C, HP-34C (scientific programmable with integration and solve), HP-37E, and HP-38E/C. This series consists of improved HP scientific calculators, statistical, scientific programmable and financial calculators.


This family consists of two handheld calculators, the HP-10 and HP-19C. The HP-10 is a handheld printing adding machine while the HP-19C is a high end programmable calculator. Both are handheld printing machines, the difference is that the HP-10 is a simple adding machine while the HP-19C is an advanced calculator with programmability.


This family has the models HP-41C, HP-41CV, and the HP-41CX. These models are packed with features because they were HP’s solution to the lack of keys and functions on the HP-67. These calculators made it easier to write and use numeric-only programs. It made programming, typing of functions, and keyboard assignments easier for the user.


This family, also known as the 10C series, consists of the HP-10C, HP-11C, HP-12C, HP-15C, and HP-16C. This series has a basic scientific programmable calculator, more advanced scientific programmable, top selling business calculator, scientific with matrix & complex math, and a computer scientist calculator. The calculators in this series look similar to each other but if you look closely, the keys are placed differently for each model.


This family consists of HP calculators that fold, also known as the clamshell series. Models in this family include the HP-18C (business model with solver) and HP-28C/S (scientific with symbolic math and solver). These two totally changed the way HP scientific calculators looked because when you open it you can see the number keys on the right and the letter keys on the left.


This family consists of lower end series models, including those models ending with B (business), S (scientific) and II. Models included in this series are the HP-27S, HP-17N, HP-22S, HP-42S, HP-32S, and the HP-14B. The different types of calculator in this series includes an algebraic do everything calculator, algebraic scientific, algebraic business, and RPN scientific with complex math.

The families here only run up to 1986. There are two other names that can be found in the HP calculator series names, Quake and Pogo. However, it shows that calculators under these families never went into production. Based on the families mentioned, the obvious trend in determining the family of HP calculators depend on how they look, what they can do, and the trend in model names. This makes it easier for consumers (then) and collectors (now) to remember HP calculator models.


The HP Calculator Database: Anything about HP Calculators

Tuesday, December 6th, 2011

Hewlett –Packard is one of the major manufacturers of calculators. In 1972, the company was one of the first to successfully design a handheld calculator that performed more than the four basic functions. It was called the HP-35 and it was the first pocket HP scientific calculator. Following the calculator’s success, the company started designing other calculators with different features to address other computing needs.

The HP-35 was smaller yet a powerful computing device compared to those first calculator models introduced in the 1960’s. From this handheld device, HP continued to produce different models like their first HP business calculator, the HP-80. This model had formulas set for users who are in the business/finance industry. After this model, HP continued to improve their calculators by adding functions, more keys, print options, and programmability options.

Over the years, with the progress of technology, HP calculators became more and more portable without compromising functionality. HP calculators performed the four basic functions, algebraic, trigonometric, logarithmic, statistical, financial, and scientific so users can solve for the information they needed in whatever industry they are involved in. From 1972 to this day, there are over a hundred HP calculator models.

There is actually a database for HP calculators set up by collectors. The calculator database is where you can find all HP calculator models and a summary of features, introduction date, and photos of each model. This is helpful for those who want to know more about HP calculators, how they advanced through the years, their differences and other information about different models.

The HP calculator database is a place where you can meet people who like collecting the calculators. People who know about these calculators can also contribute information on the database to help others on their collection. HP calculators are found to be valuable because they have the potential to become a collector’s item. So if you find an HP calculator and thought of getting rid of them, especially the old models, try to get rid of them online instead because there might be collectors who are interested in your old calculator.


HP Calculators for Your Home and Office under $30

Friday, December 2nd, 2011

If you are looking for a calculator that you can use at home or your office, HP offers a line of calculators that will fit your needs. HP is one of the top companies in the calculator industry. Their calculators perform different functions that can solve for both basic and complex solutions making them ideal for anyone under different industries like science, math, business, finance, and many more.

Now, if you need a simple calculator that will perform basic computations, here are some HP calculators that you can get under $30:

HP EasyCalc 100 Calculator ($7.99) – this is a basic calculator that performs basic math functions. Small and lightweight, you can easily bring it anywhere you go. This one has a large 12-digit display to easily see results. It runs on solar power and comes with battery backup so you do not have to worry about changing battery in a long time. This is ideal for home, school, and office use.

HP OfficeCalc 100 Calculator ($9.99) – this performs simple calculations. It is compact and designed to look great on your desk whether at home or your office. You can even use it for your small business to compute for simple sales transactions. It is solar powered to extend your battery’s life and comes with a battery backup. The big display makes results easy to read.

HP OfficeCalc 200 Calculator ($14.99) – this HP calculator is ideal for business or office use. It performs basic math calculations that you need at home, office, or your retail shop. It has a large 14-digit display so you can easily view results. Solar powered to extend battery life and comes with battery backup. This calculator is great if you need something larger than the HP OfficeCalc 100. If you are concerned about design, the HP OfficeCalc 300 ($19.99) is worth a look.

HP CalcPad 200 Calculator ($29.99) – this is a calculator that doubles up as a numeric keypad. This is ideal for business professionals that are on-the-go. Use it as a calculator for basic calculations and use it as a numeric keypad for your laptop via USB. You can choose where to view your calculations, either on the calculator or on your laptop. Its compact and lightweight design makes it easy to carry around.

These HP calculators are simple yet they guarantee ease of use with fast and accurate results. Quality is guaranteed as well because all calculators come with a 1-year limited warranty. Check out other calculators like an HP business calculator or a printing calculator if you need to solve complex calculations and print results.


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