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Frontal plane,Horizontal plane, and profile plane.
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➔3 principal planes
The three principal planes of projection used in orthographic projection are the frontal plane, horizontal plane, and profile plane. 90% the projection is called the top view or plan view. On the profile plane, the projection is called the side view or end view, or the side elevation or end elevation.The plane, horizontal or vertical, which are kept perpendicular to each other are called Principal Planes. These include the Frontal Plane, Profile Plane, and Horizontal Plane: In addition to this, if a plane is placed at any other place, then it is called Auxiliary Plane.
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