Computers Use Resources
	v Each operation of a computer (each step in the Fetch/Execute Cycle) takes a small amount of time ; As a rough approximation, assume 1 instruction per clock tick ; A 500MHz computer does 500,000,000 instructions in a second v Generally, the number of instructions needed to solve a problem determines how much time it will take … ; A 10 billion instruction computation takes 20 seconds v Networks have bandwidth limits: 100 Mb/sec v Every part of a computation takes memory, too.
					… And everything is limited by the speed of light
		Every letter or digit takes 1-2 bytes Every instruction takes 4 bytes Every integer takes 2 or 4 bytes Every decimal number takes 4 or 8 bytes