bit and byte
What is exactly bit and byte ? And why must someone bother himself to say 8 bit is 1 byte? Is a bit equal to one digit place ? And What is 32 bit windows? And why does 4 bit (place) can save numbers from 7 to -8? Is it related to binary system? If so then why it isnt 16? Because 2 to power 4 is equal to 16 not 7 ? By the way why 7 ? It must be 8 ! Why 7 ?