Why MS Excel is used.

The history of table calculators begins in the 1980's (1979 - Visicalc) and their use has considerably expanded since. Though, at the beginning, these calculators were used mostly in the field of economics, statistics and financial calculations, their use is more or less universal today and there probably aren't any technical workers who have no experience with a table calculator.

Microsoft Excel is obviously the best product. This program provides a wide scope of options and user modifications (control elements, programming language, table formatting, etc). This predestines it for use in engineering, industrial and technical calculations with the following main benefits.

The only "disadvantage", which is disputable, can be seen in the necessity to install MS Excel for the use of the calculations.