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Power through complex equations with the HP-71b calculator, a tried-and-true classic that hit the market in 1984. Anything but basic, this calculator continues to deliver the versatility and reliability you need for everything from complex algebraic equations to keeping track of time with the BASIC-compatible real-time clock and timers. Manufactured by Hewlett Packard until 1989, this handheld calculator sports a compact body with plenty of read-only memory (ROM) and user memory. This version is part calculator and part computer. The HP-71b features a QWERTY-style keyboard, a numeric calculator keypad and the ability to manage files with commands, such as COPY, RENAME, and CATALOG. Another notable feature of the HP-71B is its “operator-precedence parser with value substitution” system, which changes the way these calculators compute information and the user’s ability to integrate history. For example, with this innovative system, 71b evaluates algebraic expressions while the user enters the data instead of waiting for the final “=” key, allowing users to see their results in steps according to the construction of the equation. It also allows users to include prior results in a new expression simply by typing a set of empty parentheses into the new equation. If you need to back out of an expression, the HP-71b allows you to do just that by pressing the BACK button. For example, if you are calculating an equation such as 5*(7+6), the calculator’s system displays the answer as 5*(13). If you need to go backward to check your work or amend a step, pressing BACK reverts the display to 5*(7+6). The single-line, 22-character LCD display lets users see their work clearly as they type, 12 digits at a time. Feel free to scroll for information. The display on this calculator allows users to scroll through up to five lines. It also works in 8x132-pixel graphics mode for different file types. Password protection and file management is a breeze with the computer-like features integrated into these calculators. The system allows both secure and private files, which provides protection from accidental deletion, copying, and modification. This version of file security also extends to BASIC keywords, such as POKE and PEEK, to prevent them from altering the calculator’s memory. For even more security, the HP-71b is the type of calculator that keeps private data safe with password protection. The HP-71b features the Saturn CPU chip, the forerunner to modern versions. Complete a simple online search, and you can find detailed information about the operating system, including all the details about the card reader, source code and how to maximize files with BASIC extensions. Additionally, this calculator includes 64K bytes of ROM. Users who need an additional ROM module can seek out expansion modules to increase the ROM on the device. ROM and expansion modules allow the device to communicate with other HP machines and lab instruments at speeds roughly 25 times faster than those of the HP-41. Users who want to install additional optional hardware should search by category and version. The HP-71b is the ideal device for those who want a calculator that works like a computer.

Product Identifiers

Brand
HP
Model
71B
eBay Product ID (ePID)
92260120

Additional Product Features

Power Source
Battery
Size
Handheld
Display Type
Regular
Key Size
Regular
Digit Display
12 Digits
Type
Scientific

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Additional Product Features