101 Progress Report: A response that indicates the progress of a SIP request.
202 Accepted: A response that indicates that a request was accepted for processing.
3-D Phong shading: A shading algorithm that is used to apply shading to 3-D charts. The algorithm interpolates color between points on the surface of a chart to give a smooth 3-D appearance.
403 Forbidden: A response that indicates that a protocol server understood but denies a request.
88 object class: An object class as specified in the X.500 directory specification ([X501] section 8.4.3). An 88 object class can be instantiated as a new object, like a structural object class, and on an existing object, like an auxiliary object class.