Definition of niggling for English Language Learners. : causing you to feel a slight pain or to be worried or annoyed for a long time.
What is PPAP? The Production Part Approval Process (PPAP) is a standardized process in the automotive and aerospace industries that helps manufacturers and suppliers communicate and approve production designs and processes before, during, and after manufacture.
PPP, the standard protocol for communicating across point-to-point links, includes an optional authentication stepâthe point at which the AAA element is introduced. During this authentication phase, protocols such as the Challenge Handshake Authentication Protocol (CHAP) can be used to identify the client to the PEP.