Infantry support guns are
artillery designed for
direct-fire against
infantry targets. They are typically low velocity with short barrels, allowing them to be easier to move around. Very few support guns are still in military use, their roles have been filled be
mortars in most cases, and
wire-guided missiles in the role against point targets (such as bunkers).
Mountain guns are infantry support guns designed for use during
mountain combat.
Airborne guns are those designed for use by
paratroopers.