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Pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen . [ 2 ]
Among the construction trades, in most industrialized countries, each has a distinct 2-5 year craft apprenticeship education and usually once started a worker remains in a single craft and progresses through ranks of skill for the duration of their career (pre-apprentice, apprentice, and journeyman; some countries include a post-journeyman ...
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1]
In 1985, CI launched a calculator for the construction industry called the Construction Master [49] which came preprogrammed with common construction calculations (such as angles, stairs, roofing math, pitch, rise, run, and feet-inch fraction conversions). This would be the first in a line of construction related calculators.
Skyscrapers dominated the construction field and new technologies like prefabrication and computer-aided design emerged. Trade unions were formed to protect construction workers' interests and occupational safety and health. Personal protective equipment such as hard hats and earmuffs also came into use, and have become mandatory at most sites.
Traditional trades (known also as traditional building trades and preservation trades) is a loosely defined categorization of building trades who actively practice their craft in respect of historic preservation, heritage conservation, or the conserving and maintenance of the existing built environment.
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Old-School Essentials is a retroclone [2] that does not try to change the spirit of the original B/X rules but does try to make the rules easier to read. [1] The first five Old-School Essentials books — Core Rules , Genre Rules , Cleric and Magic-User Spells , Monsters , and Treasures — re-organize all of the original rules into a much more ...