Psyringe
Scout
ICS = Infinite City Sprawl. A strategy where you swarm the world map with masses of tiny cities. It was the best strategy in Civ1/Civ2 (so good that it actually broke those games). Corruption in Civ3 was introduced specifically to limit the usefulness of ICS (which is why the favored strategy for Civ3 is REX, not ICS). Civ4 tries to limit ICS with maintenance costs.