NX applications are changes the NX theme for using different modules in the NX.
Most used NX applications are:
Modeling: It is used for modeling or editing solid bodies, sheet bodies, 2d or 3d curves, etc…
Sheet Metal: It is used for creating sheet metal models. Also, you can convert models to sheet metal models. (for details click here)
Assemblies: It is used for making assemblies by placing parts.
Drafting: It is used for creating technical drawings for created parts.
Shortcuts for Applications:
Modeling: M or Ctrl + M
Sheet Metal: Ctrl+ Shift + M
Drafting: Ctrl + Shift + D
Assemblies: There is no shortcut in NX 12. In older versions shortcut: A
Tip 1: If there is no Application Ribbon Bar in NX, Right-click on the ribbon bar and select “Application” from the opened list.
Tip 2: If you can not find “Applications” in the “Menu” bar, click on down-arrow near the top border bar and select “Application” in the “Menu” from the opened list.