COMPUTER HISTORY AND EVOLUTION
DEVELOPMENT OF COMPUTERS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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heaven and earth
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earth and sky
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trees and plants
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heaven and sky
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Detailed explanation-1: -There are two divisions in an abacus. The horizontal bar that divides the upper and lower part is called the beam. The beads that are in the lower part are called the lower beads or the earth beads. The beads that are in the upper part are called the upper beads or the heaven beads.
Detailed explanation-2: -The Abacus was the first calculating device.It is made up of a wooden frame with rods, each having beads. The frame is devided into two parts-Heaven and Earth. Each rod in Heaven has 2 beads and the Earth has 5 beads.
Detailed explanation-3: -Each heaven bead has a value of 5 units and each earth bead has a value of one unit. A Chinese suan pan has two heaven and five earth beads, and the Japanese soroban has one heaven and four earth beads. These two abaci are slightly different from one another, but they are manipulated and used in the same manner.