For questions about Org mode's ASCII table editor. Use this tag for its spreadsheet calculations and plotting features as well.
Org mode provides facilities for simple tables that conveniently allow one to create and manipulate tables. The facility assumes that tables use a fixed-width font in order to facilitate alignment. In addition to the basic functionality, Org mode tables can function as simple spreadsheets: formulas can be defined to calculate entries, based on other entries of this table or even other tables. For more information, consult the "Tables" chapter in the Org mode manual.