Abstract: A user interface device includes: a display unit on which plural buttons are displayed; a touch panel integrally formed with the display unit and detecting input in plural input areas corresponding to respective display areas of the plural buttons; a pressure detection means for detecting water pressure; and a layout control means for changing a layout of the buttons and the input areas so as to reduce the number of the buttons and the input areas corresponding to the buttons in accordance with detected magnitude of water pressure when the water pressure detected by the pressure detection means is equal to or higher than a previously set threshold value.

Abstract: An electronic system having a function to output history information of error. A microprocessor assembled in the electronic system stores, into a memory unit, every occurrence of error, error information indicating the contents of errors of various controlled units constituting a mechanical deck unit controlled by the microcomputer, and accepts or receives a command of an operation unit to read out error information indicating those error contents from the memory unit to display history information of error on a display unit.