Modules are components that can be mounted in a module slot of a vehicle or dropsuit. These modules alter attributes of your vehicle or dropsuit to allow greater customization of your fittings.
All modules have at least one of the following requirements to be installed: Sufficient remaining amounts of energy in the Power Grid (PG) and/or CPU processing power on the dropsuit/vehicle; or high enough skill level to use the module properly. Some modules may even have a restriction that only permits one module of that type in your fitting, whilst others may have a stacking penalty that severely reduces the effects of additional modules of the same type.
A vehicle module cannot be placed in a dropsuit module slot, or vise versa.