Stands for “Liquid-Crystal Display”, LCD are a level display technology and flat screen screens. The LCD is accessible as an active matrix, dual scan, or passive-matrix display and made of two sheets of a flexible polarizing material with a layer of liquid crystal solution between the two.

Now LCD technology is being replaced by LED to enhance the performance and color screen of computers.

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Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone.