Computer


  1. Computer is a system
  2. It receives inputs, processes it, and produces outputs
  3. Without losing generality, we can restrict input as string of 0 and 1
    • Any object can be represented as string of 0 and 1
  4. Output of the system also string of 0 and 1
  5. In general, there’s no restriction on how the system mapping input to output
  6. Because of physical limitation, system can only receive input and produce output string in limited size at a time
  7. It is desirable for the system to be able to store the current output and feed it as an input for later processing
    • There’s feedback line from output to input.
    • Capability of storing outputs is done using memory of the system
  8. Because there are many strings stored in memory, the system should be able to distinguish one from the other
    • There’s an address for every place to put string in memory

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