CS101 Lecture 2 Four Important Concepts
Concept 2: To be a computer a device must do four things. • Input Information • Input Devices • Process Information • Processor • Output Information • Output Devices • Store Information • Storage Devices
Concept 3: Information needs to be in form of zeros and ones for a computer to process it. • Information must be in the form of zeros and ones because the processor is make up of switches. • Intel and Advanced Micro Devices are the two types of processors found in most personal computers • Switches in processor have two states: On and Off • Off = 0 On = 1
Four Generation of Processors When they figure out how to make processors in a different way that makes the processors faster, cheaper, smaller, and more reliable a new generation of processors is born.
What are these things? A) Stuff almost as old as the teacher B) Old fashion bullets C) Vacuum tubes D) Something floating around in “Finding Nemo”
First Generation 1939 –1944 • Vacuum tubes
Second Generation 1945 –1957 • Transistors
Third Generation 1958 – 1970 • Integrated Circuit
Forth Generation = 1971 -? • Silicon Microprocessor
Under 70 years from.. • 18,000 switches in a room, failure every day, 120,000 watts, 3 computers in the world To • Billions of switches on multicore chips, failures are rare, 35 watts, hundreds of processors in your daily life.