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Above 3000 to 5000 year age chine’s introduce ABACUS. It was a calculating device. ABACUS is a frame of wire on which bands are strung on it. Arithmetic operations are perform by manipulating the bits on the wire. In the 17 th  century a “Mechanical Adding Machine” was produce by “PASCAL”. This machine was known as adding machine because it could only add or subtract. A German Mathematician “LEIBNIZ” improved the adding machine by performing multiplication through repeated addition of a number. CHARLES BABBAGE a professor of mathematics gave the idea of “Difference Engine” in 1822. It could solve Differential Engine in 1842 became out with “Analytical Engine” but he is not able to produce because the technology at that time are not so advance. In 1945 “Dr. John Won Neumann” gave the idea of stored program computer “EDVAC” (Electronic descried variable automatic computer) was the just stored program computer. It was develop in 1952. Modern electronic computer “ENIA...

FILE MENU New (File menu) Creates a new, blank file. Open (File menu) Opens or finds a file. Close (File menu) Closes the active file without exiting the program. If the file contains any unsaved changes, you will be prompted to save the file before closing. In Microsoft Word and Microsoft Excel, you can close all open files by holding down SHIFT and clicking Close All on the File menu. Save (File menu) Saves the active file with its current file name, location, and file format. Save As (File menu) Saves the active file with a different file name, location, or file format. In Microsoft Access, Microsoft Excel, and Word, you can also use this command to save a file with a password or to protect a file so that others cannot change its contents. Save As Web Page (File menu) Saves the file in HTML format (a Web page), so that it can be viewed in a Web browser, and sets other option...