An algorithm that causes the TCP/IP service provider to buffer small data packets into larger ones before sending. Nagling prevents a TCP/IP server from transmitting many very small packets by requiring the server to wait either until it has accumulated enough small data packets to combine them into a single large packet or until it has received an acknowledgment of the prior packet. Nagling can reduce message overhead (and decrease required bandwidth), but also causes a delay before small data packets are sent (increasing latency).
normal vector
An imaginary ray extending perpendicularly from a surface that defines the face's orientation.
NRPN
Nonregistered parameter number. Nonregistered parameters can be used for different functions by different manufacturers and are accessed through MIDI controllers. For more information, see the MIDI specification.