Enables DOS to run protected-mode.

A person who extends a physician's oversight to a larger patient population than would otherwise be reasonable (by relieving the physician of much of the work done for, and time spent with, each patient); physician assistants and nurse practitioners can both provide this extension.

(automotive) A fuel-based auxiliary power unit that extends the range of a battery electric vehicle by driving an electric generator that charges the vehicle's battery.

Substance used to preserve sperm.

an American tanker and cargo aircraft that was operated by the United States Air Force from 1981 to 2024.

A penis extender is an external medical device with tentative evidence as of 2019 for Peyronie's disease.

The Canon Extender EF lenses are a group of teleconverter lenses made by Canon.