Electronic till in the form of an upgradeable calculator with a matrix display and keypad has separate display zones for display of unit prices, sub-totals, change, etc. so that selectable cash register functions can be fulfilled

摘要

Upgradeable calculator serving as an electronic till offers a number of functions of a cash register and has a coordinated matrix display with a number of separate display zones that can be used to display unit prices, totals, sub-totals, change, etc. An input keypad has a similar display and keys for input of amounts. A mode key enables selection of a particular mode of operation.