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As the original technical software partner of ACCA, [3] Wrightsoft Corp became the first HVAC software company to create a computerized version of their Manual J, Manual D, and Manual N calculation methods. The Air Conditioning Contractors of America and Wrightsoft released the very first Manual J Load calculation software (Right-J) in February ...
The CLTD/CLF/SCL (cooling load temperature difference/cooling load factor/solar cooling load factor) cooling load calculation method was first introduced in the 1979 ASHRAE Cooling and Heating Load Manual (GRP-158) [1] The CLTD/CLF/SCL Method is regarded as a reasonably accurate approximation of the total heat gains through a building envelope ...
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]
Programmable calculators have major websites with information, documentation, message boards, tools for download, and other things useful for this pursuit; the main sites for each manufacturer's calculators are run by third parties with varying degrees of collaboration from the companies themselves: namely HPCalc.org, TICalc.org, and CasioCalc ...
A manual adding machine manufactured in the 1950s. Subtraction was impossible, except by adding the complement of a number (for instance, subtract 2.50 by adding 9,997.50). Multiplication was a simple process of keying in the numbers one or more columns to the left and repeating the "addition" process.
The 10C was a basic scientific programmable calculator. While a useful general purpose RPN calculator, the HP-11C offered twice as much for only a slight increase in price. Designed to be an introductory calculator, it was still costly compared to the competition, and many looking at an HP would just step up to the better HP-11C.
A toolbox can also refer to a large tool storage system, or tool chest combos, that includes multiple pieces. These systems are almost always made from metal. Most tool storage systems are painted steel, but some are stainless steel and aluminum. They include a top chest that has drawers and a top lid that opens on a hinge.
The HP-12C is one of only four calculators permissible in the Chartered Financial Analyst exams, the others being its sister, the HP 12c Platinum, and the Texas Instruments BA II Plus and BA II Plus Professional. Often referred to as a tool for "Old-ie Time-ies," critics of the HP-12C claim its early 1980s technology and style are antiquated.