NACHA - see National Automated Clearing House Association.

NCCUSL - see National Conference of Commissioners on Uniform State Laws.

Nielsen BookScan - refers to an information system and company that collects point of sale data for the book industry.

Nielsen SoundScan - refers to an information system and company that collects point of sale data for the music recording industry. SoundScan, Inc. was founded by Mike Fine and Mike Shalett.

Nielsen VideoScan - refers to an information system and company that collects point of sale data for the VHS and DVD industries.

Nom-de-plume - refers to fictional name used by an author in place of their real name. The literal translation from French is "name of pen" or "pen name."

NSF - see National Science Foundation.

NSI - see Network Solutions, Inc.