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The HP 50g (F2229A) is the latest calculator in the 49/50 series, introduced in 2006. The most apparent change is a revised color scheme, returning the unit to a more traditional HP calculator appearance. Using black plastic for the entire body, white, orange and yellow are used for function shift keys.
The data could not be access directly, but it was possible to transfer data to and from main memory. To the calculator (and the user), data located in the extended memory looked like files on a modern hard disk do for a PC (user). The final HP-41 model, the HP-41CX, included extended memory, a built-in time module, and extended functions. It ...
Perhaps the HP-42S was to be released as a replacement for the aging HP-41 series as it is designed to be compatible with all programs written for the HP-41. 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.
HP 3000 Series III. The HP 3000 series [1] is a family of 16-bit and 32-bit minicomputers from Hewlett-Packard. [2] It was designed to be the first minicomputer with full support for time-sharing in the hardware and the operating system, features that had mostly been limited to mainframes, or retrofitted to existing systems like Digital's PDP-11, on which Unix was implemented.
The first calculator utilizing it internally was the HP-18C and the first calculator making it available to users was the HP-28C, both from 1986. [ 10 ] [ 7 ] The last pocket calculator supporting RPL, the HP 50g, was discontinued in 2015.
In addition to software and support from HP, an active user community supported the HP-67/97 as well as the other HP programmables of the era. The group was called PPC and produced the PPC Journal. One of the notable contributions of the group was the development of a "Blackbox" that allowed pseudo-alphanumeric displays.
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RPL comes in two flavors: User RPL and System RPL. User RPL is the language that a user can program directly on the calculator. System RPL requires an external compiler; this may be done on the calculator with a third-party utility, or on another machine. The two languages vary mainly in the number of low-level operations available to them.
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