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36 by 141 by 12 millimetres (1.42 in × 5.55 in × 0.47 in) The Sinclair Sovereign was a high-end calculator introduced by Clive Sinclair 's company Sinclair Radionics in 1976. It was an attempt to escape from the unprofitable low end of the market, and one of the last calculators Sinclair produced.
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.
The build time was advertised as being around three hours, and required a soldering iron and a pair of cutters. [ 13 ] [ 14 ] In January 1975, the kit was available for US$49.95 , half the price at the time of introduction a year earlier, [ 13 ] and in December 1975 it was available for £9.95 , less than a quarter of the introductory price.
1100-3A - The 1100-3A is a black and grey/gray 3.2 oz. desktop calculator made with 50% recycled plastic and has a 10 digit angled LCD display. It has 3-key independent memory and tax keys. [11] 1180-3A - The 1180-3A is a 4.8 oz black desktop calculator with a 12 digit angled LCD display. It is made with 40% recycled plastic and it has cost ...
HP-41 extension (or expansion) modules allowed the user of an HP-41 programmable calculator to extend the functionality of the machine. The HP-41 had room for up to four expansion modules at the back of calculator. The HP-41 was not the only calculator of its generation that allowed expansion modules. The TI-58 and TI-59 also had pluggable ROM ...
HP has never made another calculator specifically for programmers, [2] but has incorporated many of the HP-16C's functions in later scientific and graphing calculators, for example the HP-42S (1988) and its successors. Like many other vintage HP calculators, the HP-16C is now highly sought-after by collectors. [14]
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There are five calculators in the 49/50 series of HP graphing calculators. These calculators have both algebraic and RPN entry modes, and can perform numeric and symbolic calculations using the built-in Computer Algebra System (CAS) , which is an improved ALG48 and Erable combination from the HP 48 series .