Internet Relay Chat services (usually called IRC services) is a name for a set of features implemented on many modern Internet Relay Chat networks. Services are automated bots with special status which are generally used to provide users with access with certain privileges and protection. They usually implement some sort of login system so that only people on the access control list can obtain these services.
The most popular style of services uses a number of fake clients whose names end in "Serv". The four below are nearly always seen in services of this style.