on *:TEXT:!setworld*:#: { 
  if ($nick isreg $chan) || ($nick isvoice $chan ) { halt } 
  else {
    set %pcworld $2- 
    msg $chan The PC world has been set to: $+(%pcworld,.)
  }
}

on *:TEXT:!pcworld*:#: { 
  .notice $nick The current PC world is : %pcworld
}