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Engineer using a slide rule, with mechanical calculator in background, mid 20th century. A more modern form of slide rule was created in 1859 by French artillery lieutenant Amédée Mannheim, who was fortunate both in having his rule made by a firm of national reputation, and its adoption by the French Artillery. Mannheim's rule had two major ...
A slide rule. The sliding central slip is set to 1.3, the cursor to 2.0 and points to the multiplied result of 2.6. The slide rule was invented around 1620–1630, shortly after the publication of the concept of the logarithm. It is a hand-operated analog computer for doing multiplication and division.
Examples of analog computing devices include slide rules, nomograms, and complex mechanisms for process control and protective relays. [6] The Antikythera mechanism , a mechanical device that calculates the positions of planets and the Moon, and the planimeter , a mechanical integrator for calculating the area of an arbitrary 2D shape, are also ...
In computing, a presentation program (also called presentation software) is a software package used to display information in the form of a slide show. It has three major functions: [1] an editor that allows text to be inserted and formatted; a method for inserting and manipulating graphic images and media clips; a slide-show system to display ...
The nature of communication, the actual data exchanged and any state-dependent behaviors, is defined by these specifications. In digital computing systems, the rules can be expressed by algorithms and data structures. Protocols are to communication what algorithms or programming languages are to computations. [3] [4]
The sequence numbers always obey the rule that n a ≤ n r ≤ n s < n t ≤ n a + w t. That is: n a ≤ n r: The highest acknowledgement received by the transmitter cannot be higher than the highest n r acknowledged by the receiver. n r ≤ n s: The span of fully received packets cannot extend beyond the end of the partially received packets.
Another critical application was the slide rule, a pair of logarithmically divided scales used for calculation. The non-sliding logarithmic scale, Gunter's rule, was invented shortly after Napier's invention. William Oughtred enhanced it to create the slide rule—a pair of logarithmic scales movable with respect to each other. Numbers are ...
A flight computer is a form of slide rule used in aviation and one of a very few analog computers in widespread use in the 21st century. Sometimes it is called by the make or model name like E6B , CR, CRP-5 or in German, as the Dreieckrechner .