EPP
Depending of the context, EPP has different meanings.
An Endpoint Protection Platform is a platform for the protection and detection of computer attacks on a client computer.
An Extensible Provisioning Protocol is an XML-based Internet communication protocol for exchanges between registries and registrars. This method, unified and common between the actors, allows to make all the operations related to the domains in a secure way.
An Enhanced Parallel Port is a type of bidirectional advanced parallel port provided by the IEEE 1284 standard that increases the speed of the standard parallel port. It is the ancestor of the ECP port.