The 88 mm gun (eighty-eight) is a German anti-aircraft and anti-tank artillery gun from World War II. They were widely used throughout the war, and could be found on almost every battlefield. Developments of the original models led to a wide variety of guns that could be identified as "an 88".
The name applies to a series of anti-aircraft guns officially called the 8,8 cm FlaK 18, 36 or 37. FlaK is a German contraction of either Fl(ugzeug)a(bwehr)-K(anone) or Fl(ug)a(bwehr)-K(anone) (hence the capital K, nowadays one word) meaning anti-aircraft gun, the original purpose of the eighty-eight. In informal German use, the guns were universally known as the Acht-acht (8-8), a contraction of Acht-komma-acht Zentimeter (German: 8.8 cm).[1] The name could also describe newer and more powerful models, the FlaK 41 and 43, although these were different weapons. In general terms the gun was less capable in the anti-aircraft role than the British QF 3.7 inch AA gun or United States 90 mm gun models. Unlike those weapons, however, the 88 was built in very large numbers, and in the anti-tank role it was mounted on a versatile base from which it could be fired without unlimbering.
Its success as an improvised anti-tank gun led to a separate line of guns for anti-tank use, the Panzerabwehr-Kanone (PaK) 88 (German: "anti-tank gun") and as the main armament for tanks such as the Tiger I, the 8.8 cm KwK 36, with the "KwK" abbreviation standing for Kampfwagenkanone ("fighting vehicle cannon").

88 mm gun. (2009, March 28). In Wikipedia, The Free Encyclopedia. Retrieved 01:30, March 30, 2009, from http://en.wikipedia.org/wiki/88_mm_gun

The following photos correspond to the 88 mm. Krupp cannon exposed at the Mar del Plata Naval Base.