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A ready reckoner is a printed book or table containing pre-calculated values, often multiples of given amounts. They were widely used in shops and by tradesmen before the advent of cheap electronic calculators , metric weights and measures and decimal currencies in the 1970s.
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The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz ... meaning "stepped drum".
Schickard and Pascal were followed by Gottfried Leibniz who spent forty years designing a four-operation mechanical calculator, the stepped reckoner, inventing in the process his leibniz wheel, but who couldn't design a fully operational machine. [13] There were also five unsuccessful attempts to design a calculating clock in the 17th century. [14]
The basic mechanism of the Friden and Monroe was a modified Leibniz wheel (better known, perhaps informally, in the USA as a "stepped drum" or "stepped reckoner"). The Friden had an elementary reversing drive between the body of the machine and the accumulator dials, so its main shaft always rotated in the same direction. The Swiss MADAS was ...
Ready 5/Alert 5: Aircraft on standby on flight deck ready to be launched in 5 minutes or less. Ready room: Room on an aircraft carrier where aircrew conduct much of their pre-flight and post-flight briefs. Round Down: The stern of the Carrier where the Flight Deck Started.
The Fed is expected to cut interest rates this week, a decision likely to be the start of a gradual decline in how much consumers pay for cars, houses and everything they buy on credit.
The command for recovery is "Ready, front." If the command does not have rifles, they will salute if given the command Present arms. The arms will be lowered back to their normal position on the commands Order arms. They can also salute if given the command Hand salute. The salute is raised when the parade leader finishes saying "salute", and ...