Booleans are a feature you can use to trim multiple NURBS surfaces in one operation. Booleans provide a faster workflow by letting you trim multiple surfaces at once versus having to intersect each surface separately.

Three types of boolean operations possible in Maya:

• Union booleans - Combines two or more objects and discards the regions that overlap.
• Intersection booleans - Combine two or more objects and keeps only the regions that overlap.
• Difference booleans - Combines two or more objects and subtracts the overlapping region from the first object.