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Understand how data and programs are represented to a computer and be able to identify a few of the coding systems used to accomplish this.


Understanding Computers

Digital Data Representation

Digital computers: devices that can only understand two states, off and on, represented by the digits 0 and 1 (bits, from binary digits)

Digital data representation: process of representing data in digital form so it can be used by a computer

Computers represent programs and data through a variety of binary-based coding schemes
Bit = a single 1 or 0
Byte = 8 bits
Byte terminology used to express the size of documents and other files, programs, etc.
Prefixes are often used to express larger quantities of bytes: kilobyte (KB), megabyte (MB), gigabyte (GB), etc.

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