"external" - key terms from Wikipedia

acute external otitis
automated external defibrillator
dead external links
external
external affairs
external antenna
external ballistics
external beam radiation therapy
external beam radiotherapy
external bearing
external benefits
external carotid
external carotid artery
external combustion
external costs
external debt
external defibrillator
external entities
external examination
external factors
external field
external frame
external fuel tanks
external gills
external goods
external hemorrhoids
external isight
external link
external links
external links lead to information
external links section
external locus of control
external magnetic field
external os
external otitis
external programs
external relations
external rotator
external safety
external stakeholders
external storage
external subset
external tank
external validity
general affairs and external relations
internal and external
ministry of external affairs
space shuttle external tank
university of london external
university of london external system