5. Summary

• The most basic form of computing is INPUT -> PROCESS -> OUTPUT
• An ‘input’ is anything that that the computer needs in order to do some work. 
• All inputs eventually appear to the computer as binary data.
• Process means the computer is doing some work with input data.
• The computer creates output as a result of processing
• The most basic type of output is more data in the form of binary digits - zero and ones.
• Output data can be sent to a suitable output device or stored as a file.
• Output data can also be sent on as 'input data' to another process.