Numerical control system

A numerical control system, controlled by an operator through an input device, for displaying a machining step from among machining steps at a display device, said numerical control system comprising:

• storage means for storing at least one machining program assigned respective program numbers and including internal codes representing respective ones of the machine steps, and for storing an internal table defining the machining steps corresponding to the respective internal codes;
• setting/registering means for creating each machining program interactively in accordance with commands entered by the operator through the input device, and for registering each machining program in said storage means with the internal codes representing ones of the machining steps included in each machining program;
• searching means for searching, by using the internal codes and the internal table, the at least one machining program stored in said storage means, for the machining step specified by a search command input by the operator, and, in response, outputting search data;
• and
• display control means for displaying the search data associated with the machining step at the display device.