Normalized Device Coordinate (NDC)

Normalized device coordinate or NDC space is a screen independent display coordinate system; it encompasses a cube where the x, y, and z components range from −1 to 1. Although clipping to the view volume is specified to happen in clip space, NDC space can be thought of as the space that defines the view volume. The view volume is effectively the result of reversing the divide by \omega_{clip}operation on the corners of the NDC cube.[1]

Resources

1. https://www.sciencedirect.com/topics/computer-science/device-coordinate#:~:text=Normalized%20device%20coordinate%20or%20NDC,that%20defines%20the%20view%20volume.