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Magnetic card readers were among the first persistent memory options available. [8] The entered programs are stored on magnetic strips. Those were easy to transport, and the reader/writer was compact in size. However, the reader/writer as well as the magnetic strips were quite expensive.
The same magnetic card format was later used for the HP-41C which offered compatibility to the 67/97 through software in the card reader. HP offered a library of programs supplied on packs of pre-recorded magnetic cards for many applications including surveying, medicine, as well as civil and electrical engineering. Cards could be write ...
HP-65 in original hard case with manuals, software "Standard Pac" of magnetic cards, soft leather case, and charger The HP-65 is the first magnetic card-programmable handheld calculator. Introduced by Hewlett-Packard in 1974 at an MSRP of $795 [ 1 ] (equivalent to $5,069 in 2024) [ 2 ] , it featured nine storage registers and room for 100 ...
A full backup of the machine's 319 memory registers plus internal data required 11 magnetic cards (each card had to be inserted twice.) The card reader could read magnetic cards from the earlier model HP-67. HP-67 programs were translated into HP-41C instructions, as the HP-67 and HP-41 share the same programming model and operation stack. Some ...
A card reader is a data input device that reads data from a card-shaped storage medium and provides the data to a computer. Card readers can acquire data from a card via a number of methods, including: optical scanning of printed text or barcodes or holes on punched cards, electrical signals from connections made or interrupted by a card's punched holes or embedded circuitry, or electronic ...
A single program deck, with individual subroutines marked. The markings show the effects of editing, as cards are replaced or reordered. Many early programming languages, including FORTRAN, COBOL and the various IBM assembler languages, used only the first 72 columns of a card – a tradition that traces back to the IBM 711 card reader used on the IBM 704/709/7090/7094 series (especially the ...
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: 1974 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: 1976
Its outward appearance was similar to the HP-65, but its silver band went through between the display and the keyboard like HP-45, and the functions of some keys were different from HP-65, and it did not have a magnetic card reader/writer.