The five categories of GD&T symbols are tolerance controls for form, profile, orientation, location, and runout:
Form controls describe feature shapes like circularity, cylindricity, straightness, and flatness.
Profile controls define a surface’s 3D tolerance zone.
Orientation controls deal with angular dimensions: perpendicularity, parallelism, and angularity.
Location controls like position, concentricity, and symmetry use linear dimensions to indicate feature locations.
Runout controls, including circular runout and total runout, deal with the coaxiality of a surface—how much a feature axis can differ from a datum axis.