| 摘要 |
A system for controlling a graphical user interface (GUI) for a point of sale device (POSD), including: a tracking element, in a processor for at least one specially-programmed computer, to track, using an interface element in the computer, respective responses, by end users, to a plurality of implementations of at least one input/output (I/O) function by respective GUIs for at least one first POSD; a comparison element, in the processor, to compare the respective responses with a performance parameter stored in a memory unit for the computer; and a configuration element, in the processor, to configure at least one second I/O function in accordance with the comparison of the respective responses with the performance parameter and arranged to transmit, using the interface element, the at least one second I/O function configuration to at least one second POSD for implementation by respective GUIs for the at least one second POSD.
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