HOW CALCULATORS WORK

The calculator has had a profound impact on the world, making computations quicker and more exact. In the classroom, calculators have given many students the ability to learn about and put complex formulas and concepts into practice more easily.
Before the invention of the modern calculator, people used some other tools for computation. The abacus, for example, is one ancestor of the calculator. Probably of Babylonian origin, early abaci are believed to have been boards on which the position of counters stood for numerical values. However, the modern abacus -- which some people still use today in China, Japan and the Middle East -- works by moving beads along wires that are strung on a frame.

THE PROCESS OF MAKING RUBBER

Rubber is a specific type of polymer called an elastomer: a large molecule that can be stretched to at least twice its original length and returned to its original shape. Early forms of rubber had many gluelike properties­, especially in hot weather. In cold temperatures, rubber became hard and brittle. It was only after an accidental discovery b­y Charles Goodyear in 1839 that modern rubber became possible.

HOW OPERATING SYSTEM WORKS

 One cannot understand the function of  what he dont know,so windows xp,vista,windows 7,windows vienna,linux,symbian Os for phone e.t.c are all operating systems with exactly the same functions i.e controlling the softwares and hardwares.
Definition: An operating system (sometimes abbreviated as "OS") is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer.