Microsoft Excel is a spreadsheet program written and distributed by Microsoft. It is currently the most widely used spreadsheet for operative systems Microsoft Windows and Apple Macintosh. It is integrated as part of Microsoft Office.
A spreadsheet is a program that allows you to manipulate numerical and alphanumeric data. Spreadsheets are arranged in rows and columns. The intersection of a row/column is called cell
Each cell
can contain data or a formula that can refer to the contents of other cells. A
spreadsheet contains 256 columns, which are labelled with letters (from A to IV)
and the rows with numbers (from 1 to 65.536), making a total of 16.777.216 cells
by spreadsheet.
Because of the versatility of modern spreadsheets, they are used to sometimes to
make smaller databases, reports, and other uses.
Microsoft Excel format has extension ".xls".
One example of a valid EXCEL file is: