Computer Science SSS1 First Term

Computing Device 1

Week 5

Performance Objective

The student should able to

1. Features, component and use of Computing Device

 Content:

Early evidence of abacus dates to 200 B.C. in China. The classic abacus consists of a number of rows of sliding beads on a frame with a horizontal beam dividing the frame into two unequal halves. The number of rows varies, but there are typically five beads below the beam and two above.

An abacus is capable of performing addition, subtraction, multiplication, division, cube root and square root, and it is a much faster method of mathematics than writing calculations by hand. In fact, some parts of rural China still employ abaci in businesses, as electricity frequently fails and renders modern counting devices useless. Over a century ago.... View More