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Abaqus FEA [4] [5] (formerly ABAQUS) is a software suite for finite element analysis and computer-aided engineering, originally released in 1978. The name and logo of this software are based on the abacus calculation tool. [6] The Abaqus product suite consists of five core software products: [5]
A logical machine or logical abacus is a tool containing a set of parts that uses energy to perform formal logic operations through the use of truth tables. Early logical machines were mechanical devices that performed basic operations in Boolean logic .
The most general-purpose register-transfer logic machine is a computer. This is basically an automatic binary abacus. The control unit of a computer is usually designed as a microprogram run by a microsequencer. A microprogram is much like a player-piano roll. Each table entry of the microprogram commands the state of every bit that controls ...
It was probably in use by the working class a century or more before the ruling class adopted it, as the class structure obstructed such changes. [36] The 1:4 abacus, which removes the seldom-used second and fifth bead, became popular in the 1940s. Today's Japanese abacus is a 1:4 type, four-bead abacus, introduced from China in the Muromachi ...
Computer security is a branch of computer technology with the objective of protecting information from unauthorized access, disruption, or modification while maintaining the accessibility and usability of the system for its intended users. Historical cryptography is the art of writing and deciphering secret messages.
A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. While the history of mechanical aids to computation goes back centuries , if not millennia , the history of vacuum tube computers is confined to the middle of the 20th century.
A nano-abacus is a nano-sized abacus that performs basic arithmetic computations using various forms of nanotechnology including photonics and lateral mechanical stimulation of molecular motion with a scanning tunneling microscope (STM) tip by repulsion.
The initiative also targets schools in the United States in an attempt to encourage them to include more computer science classes in the curriculum. [3] [4] In 2013, they launched the Hour of Code across the United States to promote computer science during Computer Science Education Week. [5] [6] [7]