Microsoft Office has been the leading word processing/spreadsheet/presentation program for a couple of decades, maybe longer. It is powerful, feature-rich, and able to create files that are universally compatible with all sorts of other programs. There is only one major drawback: Microsoft Office is very expensive.
Prices for Microsoft Office vary from about $80 to around $350, depending upon the version selected. The more expensive versions typically are bundled with additional Microsoft programs, useful primarily in corporations or other environments where groups of people work together on shared projects.