In Eve Online there are multiple types of Eve Bombs: damage bombs, ECM bombs and capacitor draining bombs.
Bombs are fired from a bomb launcher. They fly for 10 sec with the same velocity of the ship that launched it, then detonate. A bomb explosion cause huge amount of damage in a 15km radius around it.
A damage eve bomb is highly resistant to the damage it does but not to other damage types. This prevents the usage of different damage types bombs but allows a single damage type multiple bombs usage. Considering resistance and damage, aprox. 7 bombs can be use simultaneous.
Properly deployed bombs can take out entire clusters of Eve Ships . The only drawback is that you either need a fast and expensive ship yourself (to deploy the bomb and then get out fast, but fast ships are poorly defended ships and you can be easily destroyed of seen and tackled) or you need a heavily slow eve online ship (in this case you need to be close to the target because the bomb flies with the same velocity as the ship it's fired from).