We have differentiated explosives into eight different categories depending upon the manner in which they are delivered.
1. Explosives on vehicles – All kinds of vehicles are used to store explosives that can either be blown up by a detonator, a remote control device or even by the driver of the vehicle. These are commonly called car bombs or vehicle based IEDs and  are generally low riding vehicles hauling too much weight, driven by one person only, and have noticeably modified interiors. Sometimes car bombs have been known to carry explosives that have been modified with shrapnel, increasing their ability to cause destruction. Proxy bombs are those where a person has been forced to drive the car by the people who have made the bomb. In order to be more aware about car bombs, you can look up the guide published by the U.S. State Department.

2. Explosives on boats – One of the things the American troops are learning on explosive stimulant training is that explosives are generally carried by boat when they are needed to attack other boats, ships or places that are attached to water bodies. These were first used during World War II by the Japanese Shinyo against American ships. Several US ships were successfully sunk using such suicide boats. Explosives on boats have also been used to kill American and British troops in Iraq.

3. Explosives on animals – It began in 1000 AD when monkeys and pigs were used as explosive carriers. The most recent examples have been a horse bomb in China which killed eight people including a two-year-old, and a donkey bomb in Afghanistan.

4. Explosives on collars – Terrorists in Columbia use these collar bombs to extort money from the local farmers. Three farmers have been killed by IEDs tied to their necks. In a similar way, a pizza delivery boy in America was killed after the bomber strapped the explosive to his neck forcibly.

5. Explosives on humans (suicide bombers) – This kind of bomb was developed by the LTTE or the Tamil Tigers. A person wears a belt of explosives and later detonates it while standing in a throng of people, killing many as well as themselves. Suicide bombers have a double impact – firstly explosives detonated this way are considered very effective and secondly, using a person with no fear of killing himself to instill fear in others. They are very common in the Middle East.

6. Explosives on platters – Called platter charges, these bombs are basically circular or rectangular pieces of steel with plastic explosives attached to one side. The weight of the explosives is usually equal to the weight of the platter. They hit the target with a high velocity, causing a forceful explosion.

7. Explosives on penetrators – These are effective because they can be used for a target more than 50 meters away. Penetrators have a cylindrical body with a special concave metal disc on top that is very useful for piercing all kinds of armored vehicles. They have been used in Iraq though not commonly since they are expensive to make.

8. Explosives on Rockets – In a nutshell, Improvised Rocket Assisted Mortars or IRAMs are propane tanks filled with explosives and driven by 107mm rockets. These were first used against the American troops in Iraq in 2008.