Posts Tagged ‘HP calculators’

Top Rated HP Calculators

Tuesday, March 6th, 2012

HP has been manufacturing a variety of calculators since the 1960s. Their calculators are powerful and known to cater to professional needs. Today, they are still one of the top brands that create calculators. Occasionally they release new models but their previous models still work really well. That is why HP continues to manufacture improved versions of their previous models.

If you are looking for a HP calculator to help you solve graphing, financial, business, and engineering problems, here are some of HP’s top rated calculators that you can choose from:

HP 50g Graphing Calculator ($129.99) – this graphing calculator features a 2.5MB memory so you can perform all the work that you need. It has a large screen display. You can change data entry modes from RPN, algebraic, and textbook. It contains 2300+ built-in functions, lessons, and step by step problem solving. This calculator is powerful and great for engineering, math, and science professionals. It is also great for college students that are dealing with calculations and graphs.

HP 12bII+ Financial Calculator ($99.99) – this financial calculator is great for those who are in the real estate, finance, and business industries. It features 250 built-in functions, highlights two-variable statistics and forecasting, and can store data with its 28K memory. You can change data entry mode to RPN and algebraic. You can easily calculate for variables like bonds, value of money, convert currency and many more. It is also great for business students.

HP 15c Scientific Calculator ($99.99) – this is one of HP scientific calculators. It is back and 100x faster than the original model. It performs complex calculations, matrix operations, root solving, and numerical integration. Experience simplified data entry with its RPN mode. It also comes in a compact design so you can easily take it with you wherever you go. It is great for scientists, engineers, and collectors.

HP 12c Financial Calculator ($69.99) – this business calculator is great for business and finance. You can store data, solve problems easier with its 120 built-in functions, and easy data entry with its RPN mode. If you cannot remember the tasks that you performed, you can access up to the last 99 steps that you performed on your calculator.

HP 35s Scientific Calculator ($59.99) – this model lets you choose between RPN and algebraic data entry modes. It lets you program your keystroke, work on heavy calculations with its 30KB memory, allow you to solve for different variables with its 100 built-in functions, and then view your inputs and results on its two-line display. You can also simplify physics with its built-in physical constants.

These are HP’s top rated calculators so far this year. They are tried and tested by professionals.  Some are already a remake of an old model and customers still buy them. If you are a professional or a student who wants a calculator that is powerful and will last, check out these HP calculators.


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.


Understanding HP Calculator Model Numbers and Letters

Monday, December 5th, 2011

HP calculator and computer models have numbers and letters after the brand name, HP. The company used this technique so consumers can easily distinguish one model from another. Through the history of HP calculators, there are some models that have numbers while others that have both numbers and letters. These numbers and letters have corresponding meanings that may prove helpful to consumers and those who collect all kinds of HP calculator.

HP did not just assign random numbers and letters as model names, like the first handheld HP scientific calculator, the HP-35. It got the model number because it had 35 keys. However, the rest of the early handheld models, like the HP-80, HP-45, HP-65, HP-90, did not get their model numbers from how many keys they had but were different from each other nonetheless.

The company’s calculator line-up grew from HP scientific calculators to business calculators, and then there are those with different features like programmability and printing. Some calculators are improved versions of previous models, and to make a distinction, HP added letters after model numbers like the HP-25C. This model was taken from the HP-25 and added a “Continuous Memory” feature, thus the letter C at the end. Later on, all models with “Continuous Memory” had a C after the model numbers like the HP-29C and HP-19C. Another example is the HP-97 and HP-97S where the HP-97S had a serial interface.

The first series of HP calculators that had letters after model numbers are those in the Spice or 30 series. The first four HP scientific calculators in this series did not have continuous memory like the HP-31E and HP-32E. Those that did have continuous memory had the letter C after the E, like the HP-33E/C and HP-38E/C.

Another HP calculator series with numbers and letters are the HP-41C, HP-41CV, and HP-41CX. The HP-41C was an improved version of the HP-67. It had 3 shift keys adding more functions to the calculator. The HP-41CV had data registers five times more than the HP-41C, the “V” was for Roman number five. With the HP-41CX, the X means “Extended” because this model was like the HP-41CV with built-in extensions, extended functions, and extended memory.

The first HP calculator model to reuse a name was the HP-10C because there was already an HP-10. However, this model was similar to the HP-31E rather than an improved version of the HP-10. The HP-10C was a handheld basic scientific programmable with built-in printer, which was a simpler model of the HP-19C. People started adding A after the model names, like the HP-10 became the HP-10A to distinguish it from the HP-10C, and later on with the HP-10B (All three models are totally different from each other).

The HP-75C handheld computer was the next handheld model after the HP-10C. It was soon followed by the HP-71B and HP-75D. The HP-75D was like the HP-75C with a port for a barcode reader. The HP-94 model series followed the same pattern with the HP-94D, HP-94E, and HP-94F. The letters D, E, and F signify the three handheld models’ memory capacity having 64k, 128k, and 256k respectively. After this series, HP went back using just a “C” with the HP-18C and HP-28C.

The next series of calculators from HP used the B and S letters which stood for Business and Scientific, like the HP-19B and HP-28S. Then, the company stuck with the letters B and S for HP business calculators like the HP-10B, HP-14B, HP-20S, and HP-42S. After these, models like the HP-19BII, HP-17BII, and HP-32SII came out as improved versions (with RPN and algebraic notation) of earlier models without the II in the name. Models like the HP48SX stood for scientific expandable, the version without extensions were called HP48S. The next HP calculator models like the HP95LX and HP95LX1MB had a Lotus expandable feature and one model had 1 megabyte RAM. The models HP48G and HP48GX are new versions of the HP48S and HP48SX. The G stood for graphical calculator.

HP calculators started with numbers as model names, and then as their line of calculators grew they added letters after the numbers to mark improvements or added features. Understanding the trend on how HP calculators are named can help those who want to know about these calculators or if you want to start collecting, this information will guide you through different HP calculators and easily determine how different each model is from another.


    Search in Articles

Why Shop at