Nickserv
Nick Services allows you to register your nickname. This will prevent others from using it.
For detailed help on a command, type: /NICKSERV HELP <command>
The following commands are supported:
REGISTER - Register a nickname
SET - Change settings, including the KILL option.
ACCESS - Setup a list of addresses allowed to use nickname
GHOST - Terminate a ghosted nickname
DROP - Drop a registered nickname
INFO - Return nickname details
HELP - Provides detailed help information
basically to register your nickname type /nickserv register password (password being one you made up)