Crowbar (DX)

In Deus Ex and Deus Ex: Invisible War, the crowbar is a melee weapon.

It's usually found in industrial areas, such as in elevator shafts or near power generators. Gunther Hermann seems to show an affinity for crowbars, as seen on a note in the crowbar's description in Deus Ex. The first one in Deus Ex is found at the Liberty Island dock, next to some crates.

Tactics
The crowbar is only useful for dedicated melee players, as it does more damage per swing than the Combat Knife. Otherwise it's quite useless, as you still need two hits to break a crate and it takes twice as much inventory space.

In Deus Ex: Invisible War, the crowbar is merely a slight upgrade to the combat knife. If you're using the baton or have the energy blade, don't bother. Otherwise, you should pick it up, if only to make destroying crates a little bit easier.

In-game Description
A crowbar. Hit someone or something with it. Repeat.

 Many crowbars we call "murder of crowbars." Always have one for kombat. Ha. -- Gunther Hermann 

Trivia

 * The Crowbar is actually a direct reference to the one in Half Life, Gordon Freeman's first weapon. Its use here is identical - break open crates, remove obstacles and bludgeon approaching enemies.

Łom (DX) Łom (DXIW)