(aviation) An instrument installed in an aircraft that indicates the rate at which the aircraft is gaining or losing altitude.

An aircraft instrument that shows both the aircraft's rate of turn about the vertical axis and also the amount of banking about the longitudinal axis.

(management) A financial or non-financial metric used to help an organization define and measure progress towards its goals.

plural of body mass index

Alternative form of turn-and-bank indicator

plural of process window index

plural of stock market index

plural of temperature-humidity index

(communication, nautical) an emergency location radio beacon, used on ships

plural of emergency position indicating radio beacon