surfaces develop vertical lift.
ALQ-131   A jamming pod mounted on the underside of the
    F-16 designed to counter enemy radar.  (See  ECM.)
alt. vert. velocity   Altitude Vertical Velocity.
AMRAAM   Advanced Medium Range Air-to-Air Missile, 
    the AIM-120.
angle of attack   The angle formed between the chord of     
    the wing and the direction of the undisturbed flow or 
    relative wind.
angle-off    The distance, measured in degrees, between
    the headings of two opposing aircraft heading.  This
    angle gives a measure of relative fuselage alignment.
AOA   Angle of Attack.
APG-66   Designator for the radar installed in the F-16.
Aphid   Soviet-built, all-aspect heat-seeking missile.
ARC Light Operations   B-52 operations in Southeast Asia
    during the Vietnam War.
aspect angle   The angle formed by the intersection of two
    lines:  the line from plane to target and the line through
    the target's longitudinal axis. On the HUD, the aspect
    angle is represented by a caret on the aiming reticle.  If