Apus -

: Provides the necessary pneumatic or electrical force to start the main jet engines.

: Eliminates the need for a separate dedicated graphics card for many standard computing and gaming tasks. : Provides the necessary pneumatic or electrical force

: Supplies "bleed air" for cabin air conditioning and pressurization during ground operations. APUs power sleepers' HVAC

: In semi-trucks, APUs power sleepers' HVAC, appliances (microwaves/TVs), and battery charging without idling the main engine. 2. Computing (Accelerated Processing Unit) : Provides the necessary pneumatic or electrical force