[. . . ] Do not press too hard against the LCD panel because it contains glass. [. . . ] Prior to starting calculation, press to clear any residual values and calculation instructions in the calculator. For expressing calculation examples, only the symbols that are required for explanation are mentioned. Example procedures are listed in following manner unless otherwise specified. To perform a tax calculation, first it is absolutely necessary to set and check the tax rate. [. . . ] This equipment complies with the requirements of Directive 89 / 336 / EEC as amended by 93 / 68 / EEC. [. . . ]