Technical

A Technical is an improvised fighting vehicle that is typically a heavily modified civilian vehicle though this distinction can include military vehicles that have been modified with additional firepower or armor. Technicals are staples of warfare where one or more combatants do not have the funds or resources to purchase or maintain more dedicated fighting vehicles such as APC's and tanks. Among the more famous uses of technicals were during the later stages of the 1987 Chad-Libya War (known widely as the "Toyota Wars") and during the long Somalian Civil War, where the status of a warlord could be measured by the size of his fleet of technicals.

Description
Typically a civilian vehicle with additional armor and added weaponry. The most common deception is of a pick-up truck with a mounted heavy machine-gun, though these can range from up-armored motor-scooters to five-ton flatbeds armed with anti-aircraft cannons or recoilless rifles.

In game
They are seen in "Charlie Don't Surf" and "Death From Above" in Call of Duty 4. It is a red or white 4x4 pick-up has a mounted 50cal. MG on it.

Trivia

 * It has the only M2 Browning machine gun in the game.
 * The name "Technical" came during the Somalian Civil War. Reportedly, Red Cross Aid workers were often accosted by warlords for cash to fund their clans. The money was then written off as "Technical Expenses".
 * It's possible but unlikely to be killed by one in the beginning Charlie Don't Surf on Veteran.