What is another word for APU?
Pronunciation: [ɐpˈuː] (IPA) 
The term APU, which stands for Auxiliary Power Unit, is used to refer to a device generally installed on-board aircraft that delivers electrical power and/or pneumatic power to the main engine at the start of operation. There are a number of other terms that can be used synonymously with the term APU, including 'ground power unit' (GPU), 'air turbine starter' (ATS), 'power pack unit', and 'auxiliary power plant' (APP). Some more slang terms used in aviation industry can be 'hobbit' or 'turbine pig'. Regardless of the term used, APUs play a critical role in the efficient operation of aircraft, often providing power during crucial stages of flight.
