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2. HP-65 - Wikipedia

   en.wikipedia.org/wiki/HP-65

   The HP-65 introduced the "tall", trapezoid-shaped keys that would become iconic for many generations of HP calculators. Each of the keys had up to four functions. In addition to the "normal function" printed on the key's face, a "gold" function printed on the case above the key and a "blue" function printed on the slanted front surface of the ...

3. Calculator Here We GO! - Wikipedia

   en.wikipedia.org/wiki/Calculator_Here_We_GO!

   The arrangement of digits on calculator and other numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash registers. It is notably different from the layout of telephone Touch-Tone keypads which have the 1 - 2 - 3 keys on top and 7 - 8 - 9 keys on the third row.

4. TI-59 / TI-58 - Wikipedia

   en.wikipedia.org/wiki/TI-59_/_TI-58

   TI-59 mounted on a PC-100A thermal printer. Also available for the TI-59 and TI-58 was a thermal printer (the PC-100A, B, and C models); the calculator was mounted on top of the printer and locked in place with a key. The calculator can be programmed to request input from the user, and output results of calculations to the printer.

5. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   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 ...

6. Programmable calculator - Wikipedia

   en.wikipedia.org/wiki/Programmable_calculator

   Some calculators run a subset of Fortran 77 called Mini-Fortran; the compiler is on the calculator so connecting to a PC to put programs onto the machine is not needed. The OnCalc C Compiler for the Casio fx-9860 series is now available. The Sharp PC G850V pocket computer has an onboard C compiler in addition to an assembler and a Basic ...

7. HP-12C - Wikipedia

   en.wikipedia.org/wiki/HP-12C

   Deviating from the HP original, these calculators feature a dot-matrix display, switchable fonts and clock speeds, and, based on a Silicon Labs CP2102 converter chip, [27] they come with a USB [28] serial interface to exchange data with a PC etc. for backup purposes (and possibly to communicate with applications like PC-based HP-12C emulators ...

8. HP 48 series - Wikipedia

   en.wikipedia.org/wiki/HP_48_series

   The HP 48 series of calculators support a stack-based programming language named RPL, a supposed combination of Reverse Polish notation (RPN) and Lisp. RPL adds the concepts of lists and functions to stack -based programming, allowing the programmer to pass unevaluated code as arguments to functions, or return unevaluated code from a function ...

9. HP-42S - Wikipedia

   en.wikipedia.org/wiki/HP-42S

   Since it lacked expandability, and lacked any real I/O ability, both key features of the HP-41 series, it was marketed as an HP-15C replacement. The 42S, however, has a much smaller form factor than the 41, and features many more built-in functions, such as a matrix editor, complex number support, an equation solver , user-defined menus, and ...