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The HP-45 is the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 [1] with an MSRP of US$395 [2] (equivalent to $2,711 in 2023). [3] Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.
Horizontal pitch (HP) is a unit of length defined by the Eurocard printed circuit board standard used to measure the horizontal width of rack mounted electronic equipment, similar to the rack unit (U) used to measure vertical heights of rack mounted equipment. One HP is 0.2 inches (5.08 mm) wide.
Programmable Calculators Pictures, specifications, and details for most HP calculator; The HPDATAbase, a collection of data about all HP calculators; wiki4hp. Community driven wiki about HP calculators and related resources. Kahan, William (2020-11-16). Kahan on HP calculators: Solve, Integrate and Matrix Operations. Turing Awardee Clips.
Pages in category "HP calculators" ... X. HP Xpander This page was last edited on 27 July 2020, at 20:12 (UTC). Text is available under the Creative Commons ...
1×4-pin RS-232, HP SIR: 3×1.5 V (4.5 V) AAA: 1991–1993 [11] HP-28S: HP 48G: HP 48SX: 2 MHz Clarke (Saturn 1LT8 core) 32 KB RAM, expandable via 2 card slots of 128 KB RAM/ROM each, not flashable 131×64 pixel monochrome LCD Entry RPN: Dynamic: RPL: Rudimentary [8] 8-bit RPL character set: Buzzer 1×4-pin RS-232, HP SIR: 3×1.5 V (4.5 V) AAA ...
Generic plugs are often described by their inside diameter, such as 2.1 mm DC plugs. After the two common 5.5 mm OD (Outer Diameter) plugs, the next-most common size is 3.5 mm OD with a 1.3 mm ID (Inner Diameter), usually about 9.5 mm in length, although both longer and shorter versions also exist.
HP-19B, introduced on 4 January 1988, along with the HP-17B, HP-27S and the HP-28S, and replaced by the HP-19BII (F1639A) in January 1990, [2] was a simplified Hewlett Packard business model calculator, like the 17B. It had a clamshell design, like the HP-18C, HP-28C and 28S. [3]
The height of the plug's insertion area is 0.260 inches (6.60 mm) and the contacts are 0.040 inches (1.02 mm) apart (contact pitch), so the width is dependent on the number of pin positions. [ 7 ] [ 8 ] However, not all plugs from all manufacturers have this capability, and some jack manufacturers warn that their jacks are not designed to ...
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