HEIR, GENERAL. Heir at common in the English law. The heir at common law is he who, after his father or ancestor's death has a right to, and is introduced into all his lands, tenements and hereditaments. He must be of the whole blood, not a bastard, alien, &c.
An air data computer (ADC) is a avionics component that assimilates the inputs from an aircraft's external and system sensors and returns a series of calculated results critical to the control of the aircraft. In one compact package, the air data computer performs what a bank of individual instruments were once required to do. Almost all the flight-related information displayed in newer commercial aircraft fitted with glass cockpits is compiled by an air data computer.
Almost every vehicle built from the early 1990's onward contains a small component called a powertrain control module (PCM) that electronically controls parts and runs diagnostic tests. Function A powertrain control module is a printed circuit board computer housed in a heavy duty case that can withstand the extremes of temperatures normally experienced inside a vehicle's engine. The module constantly sends electronic signals to all of the different components in the engine, and tests the temperature and airflow around them, to check on the status of their operation. When a component is not working properly, the module turns on the check engine light on your vehicle's dashboard.