Lightbulbs with Tuple Spaces
	Many Bulb-to-Space mappings; l Bulb state = sum(tuples) mod 2 l Bulb state = num(tuples) mod 2 l Bulb state = last tuple Choice determines many qualities of resulting system l Can a client reliably determine the state? l How easily can we recover from partial failure? This issue is common to OO RPC and Email