Numerical controller

A numerical controller that manages at least one operation process and executes display control of an icon of an application along a flow of the operation process, the numerical controller comprising:

• an application manager configured to register at least one application to the operation process and configured to manage an operation state of the registered application and the operation process presently executed in the operation process;
• and
• a menu display application configured to execute display control of a screen based on the operation state of the application acquired from the application manager, wherein the application manager outputs a notification, which indicates that the operation process is started, to the application registered to the presently executed operation process,
• the application manager instructs the menu display application based on a notification of a request of input of a user sent from the application such that the application which sent the notification of the request of the input of the user is emphasized and displayed, and
• when the application manager receives a notification of completion of the operation from all of the applications registered to the presently executed operation process, the application manager determines that the presently executed operation process is completed and advances the presently executed operation process to the operation process to be executed after the presently executed operation process among the operation processes.