The AEVs are used to support the engineer troop during their work and ensure a certain level of protection against different means. The vehicles are usually based on armoured vehicles, but they are heavily modified. AEVs are often equipped with a wide range of tools, as well as winches or mine clearing equipment.

APCs are used for transportation of troops and material. They are highly mobile and can do longer routes without any problems.
They are normally not used to give direct fire support to the infantry, they have only a light armour and armament.

These vehicles are used for reconnaissance missions on the ground. For that purpose they are equipped with a wide range of different optical and electronical recon devices.
They are normally small and highly mobile vehicles, optimized for lowest possible detecting possibility. The vehicles have only a basic armour and also just a light
armament.

ARVs are used to recover other vehicles at the battlefield. They can also be equipped with cranes and winches. Those vehicles are mostly developed on basis of already existing vehicles. They carry a wide range of special tools to and support repair works in the field. The armor of the ARVs are comparable to the vehicles they are based on. The vehicles do not have any powerful armament.

AVLBs are used to improve the mobility of armed units. The only purpose of these vehicles is to provide a help in crossing trenches and obstacles. For that purpose, AVLs
mount a small bridge including laying device, which is transported on the back of the vehicle.
Various bridge types are available, for instance single part over scissors type or sliders. AVLBs are usually based on existing armoured vehicles, but without an armoured turret. The use of existing chassis ensures easier logistics and mobility, as well as a good protection for the crew.

AWCs are usually based on available combat vehicles, which are heavily modified. The resulting vehicle consists mainly of the chassis and propulsion of the
original one, plus basic armour and equipment to mount cargo. AWCs are then used to mount various types of available weapon, which can range from artillery to air defence guns or missile packs.
Weapon carriers are a relatively cheap way to equip available vehicles with a reasonable weapon. The modifications are often done during field maintenance.

Autocannons are long barreled automatic weapons with a caliber diameter larger than 20mm. Autocannons are similar to machine guns, but differ by caliber and the used ammunition. Usually, different type of exploding projectiles are used, but also single piece AP ammunition.

Cannons are long barreled weapons with a caliber diameter larger than 20mm and a high ratio of caliber and barrel length. Cannons are usually single shot weapons firing flat trajectory fire. Usually, canons are fired directly on the target, but they can be directed also indirectly if needed. Because of the flat trajectory, canons fire rounds with high muzzle velocity but relatively low mass. A large variety of ammunition types is available for various purposes, from armor piercing anti-tank rounds, over high explosive rounds to smoke grenades. Ammunition is loaded fed or worth the help of (semi)automatic loading
systems.

Combustion engines are used as main propulsion system for nearly all AFVs. Engines burn a fuel/air mixture in a cylinder and convert the resulting linear movement in a rotary one.

Driver training tank's are special vehicles to train new tank drivers. The vehicles usually consist of the hull of a normal tank, which contains the driver's position. The tank usually contains a position for the instructor and his additional controls. The instructor can be placed in the hull, but more likely in a new turret, replacing the original weapon one. As the turret for the instructor is not as heavy, additional weight and often even a gun mock-up is added.
Driver training tanks are quite expensive, which is why not all tanks have such a special version.

IFVs are used to transport the infantry on the battlefield and to provide a certain level of mobility, protection and firepower. They are relatively light armored, and usually only withstand small and medium caliber weapons. To ensure joined operations with MBT units, IFVs usually having an excellent mobility.
The secondary role of Infantry Fighting Vehicles is the direct fire support of the infantry against all enemy threads. For that purpose, IFVs are equipped with light and medium guns, as well as ATGM starters.

Light tanks are armoured combat vehicles which carry significant less weight than other comparable vehicles of their area.
Light tanks are high mobile and well armed, but they have only light armour. Originally light tanks had a weight of less than 10t and were armed with machine guns only. Today light tanks have a combat weight between 20 and 35t and are armed with a wide range of different weapon systems, up to large high velocity guns.
Usual roles for light tanks are recognition missions, but also anti-tankcombat or support of airborne units.

Machine guns are long barreled automatic weapons with a caliber diameter of up to 20mm. MGs are able of discharging a rapid series of projectiles when fired. MGs usually fire non-explosive single piece projectiles.
Originally, machine guns have been used as main armament of armored combat vehicles. Today they are mainly used for defence against ground and air threats, or as secondary armament. One of the biggest advantages of the machine gun is the flexible usage. Due to the small caliber a relatively high amount of ammunition can be loaded. Often, the weight of the weapon is low enough to allow a usage as personal weapon for dismounted tank crews.

The designation Main Battle Tank came up in the late 20th century. Originally, this class of vehicles was also called "Universal Tank". The MBT replaced the differentiation in light, medium and heavy tanks.
The main purpose of Main Battle Tanks is the combat against armoured vehicles. To do so, MBTs are usually equipped with a large caliber powder canon. Today, the effective battle range is at 2.000-3.000m. The secondary usage of the MBTs is the fight against nearly every possible thread on the battle field, from dismounts to helicopters. For this purpose, the tanks are equipped with a variety of secondary arms and appropriate ammunition types. MBTs are equipped with a strong frontal armour, which is nearly impossible to defeat with normal MANPATs. The weak points are the lighter armoured vehicle sides, as well as the bottom or the roof top.
MBTs are very large targets, which are often easy to detect. Still, they form the most important instrument available in modern ground battle, be it for attack or defence.

Panoramic sights are used to provide certain crew members with an extremely wide field of view. Usually, such sights can be rotated 360deg. Panoramic sights contain a day channel and often also some sort of night sight. To develop the full potential, panoramic sights have to be stabilized and even contain a laser range finder. The most common usage is as commander's independent sight. Using such a sight for the commander, the vehicle develops hunter-killer-capabilities, enabling several crew members to track targets independently.

Self-propelled air defence systems contain all types of vehicles used to attack aerial targets. Such vehicles can carry a wide range of equipment, from radar stations to missile launchers.

Self-propelled anti-aircraft gun systems are vehicles used for close range air defence. Such vehicles use a high mobile chassis in combination with a rapid firing
machine weapon.
SPAAGs have been first developed during WW2 and are still one of the most effective AA systems.

A Self-propelled howitzer is a high mobile vehicle of the artillery. It usually consists of a howitzer which is mounted on top of a military chassis. In addition the self-propelled howitzer is usually delivering some ballistic protection to crew and armament.

Due to the wide range of modifications carried out on armoured vehicles it is nearly impossible to track them.
The class of Special Vehicles includes all vehicles that do not belong to any other class, like e.g. observing or fire fighting vehicles.

Submachine guns are short barreled automatic weapons with use pistol ammunition. Submachine guns are easy to handle, have small dimensions and weight. Because of these favorable features, armoured vehicle crews are often equipped with submachine guns.

TDs have been developed first time during World War 2. The main goal was to mobilize infantry anti tank guns.
The development ended with the use of normal MBT hulls. The turret has been replaced by special housing for the crew and the powerful gun in the front.
TDs do normally have a stronger frontal armor compared to the tanks they are based on. The disadvantage is the low horizontal movement of the main gun.
Tank Destroyer have been in service till the 1970s, some vehicles are still in use. Especially China and Russia still develop new Tank Destroyers, but now equipped with a traversable turret.
As a subversion the Tank Destroyer, Missile Tanks have been developed. Those vehicles use Anti Tank Guided Missiles instead of the main gun.

Transmissions are used to manipulate the powerflow between engine and final drive. By using a transmission it is possible to adopt the given torque or speed to a needed level.

Turbines are used to transform the kinetic energy of gasses or liquids into a rotation. So called gas turbines are used for vehicle propulsion where a compressed fuel/air mixture is burned. The resulting gasses are used to power the turbine.