Abstract: An electronic apparatus operated by a sales clerk includes a display, a camera configured to capture an image of a code displayed on a screen of a portable registration apparatus operated by a customer in a store, the code corresponding to one or more commodities to be purchased and check data indicating whether each of said one or more commodities needs to be checked by the sales clerk before being checked out, and a processor configured to, when the image of the code is captured by the camera, acquire information indicating said one or more commodities to be purchased and the check data using the code, and control the display to display a screen showing one or more commodities that need to be checked by the sales clerk based on the acquired information.

Abstract: A communication service simulator simulates communication service specification for a communication network having terminals and server nodes. The terminals of the communication network are registered in association with terminal data. When a called terminal has not been registered as terminal data during a simulation of a communication service specification, a terminal simulator registers the called terminal and the associated terminal data and displays the terminal data on a screen. A history regenerate/display unit displays on the screen any history of the content of a history storage unit. A simulation process controller copies a simulation process and separately executes and displays each of the processes when there is a branch, etc. in a communication service specification.