HP Calculators - Calculators

Calculators

Below are some of HP’s calculator models produced over the years, in numeric rather than chronological order:

• HP 9g — Graphing calculator designed by Kinpo Electronics, Inc.
• HP 9S — Scientific calculator designed by Kinpo Electronics, Inc., with the same form factor as the 9G and the 30S
• HP-10 — 1977 basic 4 function calculator with printer and conventional arithmetic entry (no RPN).
• HP-10C — 1982–1984. Range entry calculator, Scientific Programmable, statistical functions.
• HP-11C — Scientific Programmable, including hyperbolics, gamma function, statistical functions, and random number generation.
• HP-12C — The finance-centric calculator from the HP-10 series introduced in the 1980s. The longest running product in the HP calculator line, it remains in production.
• HP-15C — Advanced Scientific Programmable, including hyperbolics, gamma function, combinatorial and statistical functions, random number generation, numerical integration, numerical root finding, plus comprehensive matrix operations and full support for complex numbers.
• HP-16C — Computer science calculator that could perform binary arithmetic, base-conversion (decimal, and binary, octal, and hexadecimal) and boolean-logic functions.
• HP-17B — Financial calculator superseding the 12C, with two-line display, alphanumerics and sophisticated Solve functions rather than step programming. Uses the Saturn chip set.
• HP-18C — A 1986 RPL clamshell business calculator.
• HP-19B — Financial calculator.
• HP-19C — 1977 calculator with RPN and built-in thermal printer. Included a programming language with looping and branching.
• HP 20b — 2008 financial calculator with RPN.
• HP-20S — A basic scientific calculator, using infix notation, barely programmable and with no graphing capabilities.
• HP-21 — Scaled-down HP-25.
• HP-25 — Smaller programmable model with programs up to 49 steps. Version HP-25C was first calculator with "continuous memory".
• HP-27S — The first HP calculator to use algebraic notation only rather than RPN. A 1988 scientific calculator, it was a "do all" calculator that included algebraic solver like the HP-18C, statistical, probability and time/value of money calculations. It had no programmable features.
• HP-28C — (1987) RPN scientific graphing calculator. First graphing calculator, and introduced the Forth-like RPL, programmable keys, and symbolic equation solving, with 2 kB of user memory. Book-style design (flip-open cover) with keys on both interior halves. Intended for programs to be entered, used, and then deleted.
• HP-28S — (1988) Expansion of HP-28C; 32 kB of user memory due to customers unexpectedly keeping programs in memory for extended periods). Introduced a file system for storing variables, functions, and user programs in the form of a multi-level tree (similar to Unix filesystems). Like the HP-28C, this model used the "open-book" physical design. Functionally a direct predecessor to the HP-48 series, which returned to a more traditional physical design based on the HP-41.
• HP-29C — 1977 calculator with RPN. Included a programming language with looping and branching. An inexpensive variation on the 19C printer.
• HP 30b - Programmable Financial calculator released in 2010. Built in Black-Scholes Equation, FMRR and MIRR. Powered by ARM processor. Multiple input methods including RPN, Chain algebraic, and normal.
• HP 30s — Calculator designed by Kinpo Electronics, Inc.
• HP-32S — Scientific programmable
• HP 33s — Calculator designed by Kinpo Electronics, Inc.
• HP-33C — Scientific Programmable—successor to the HP25 and HP25C.
• HP-34C — First calculator with integration and Root Finding.
• HP-35 — HP's first pocket calculator, and the world's first pocket calculator with transcendental functions. As such, it is regarded as the first "scientific" calculator.
• HP 35s — Introduced to commemorate the 35th anniversary of the HP-35, it is an advanced scientific programmable calculator, featuring algebraic and RPN modes, hyperbolics, statistics, numerical integration, numerical solver, random number generation, equations, and full programmability, using up to 32 Kb of RAM for programs and data.
• HP-38G — a simplified graphic model, using infix notation.
• HP-39g series — A successor to the HP-38, using infix notation.
• HP-39gII — Released in 2012.
• HP-40 series — A successor to the HP-38, using infix notation.
• HP-41 series — Three models in this series were released over its lifetime, the 41C, 41CV, and 41CX. The 41C had user configurable program steps and memory registers, alpha-numeric display, user programmable key mappings, and four expansion ports that could hold additional memory, an interface to HP-IL peripherals, a magnetic card reader–writer, or commercial application programs. The 41CV quadrupled the amount of base memory, and the 41CX added a clock and some additional functions and memory.
• HP-42S — a non-expandable follow-up to the HP-41 series. It included a two line display (dot addressable) and featured built-in matrix and complex number mathematics.
• HP-45 — Improved version of the HP-35 with 10 memory registers, extra functions and display format selection.
• HP-48 series — Programmable scientific(S), then later graphic(G) model calculators. Based on the functionality of the HP-28S, but with a return to a traditional appearance (similar to the HP-41 series). Historically one of the most popular models among engineers. Uses a filesystem first introduced on the HP-28S. Has a real-time clock and an operating system with programmable-action alarms, which could turn on the calculator and run arbitrary user programs at a user-specified time & frequency.
• HP-49 series — Enhanced, graphic versions of the HP-48 series. Later models designed by Kinpo Electronics, Inc.
• HP-50g — As of 2007, the latest member of the HP-49 series. Faster (ARM processor), larger display, and ability to read/write removable SD memory cards.
• HP-55 - Lower cost version of the HP-65; no magnetic card reader, only 49 programming steps, but had 20 registers instead of just nine. Only model with an accurate (quartz crystal) stopwatch mode.
• HP-65 — First programmable pocket calculator. Programs could be up to 100 steps in length and could be written to or read from magnetic strips.
• HP-67 and HP-97 — Improved version of the HP-65, HP-97 is a desktop version.
• HP-71B — Handheld model natively programmable in an extended BASIC language including a RAM-based filesystem, recursion, multiline user-defined functions and subprogram calling with parameter passing, but also capable of accepting plug-in ROM modules to provide such functionalities as full I/O capabilities to any type of device (printers, mass storage, measurement instruments), programmability in other languages (Forth, Assembler), advanced math capabilities (such as matrix operations, support for complex numbers, multidimensional numerical integration and root finding, Fast Fourier Transforms, etc.), and an advanced Calculator Mode capable of executing algebraic expressions one step at a time and undoing individual steps.