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| Computer data is in what is called binary format. This means that it is always a 0 or a 1. It only has these two states and must be in one of them. |
| There are several fundamental data units which include: |
| • Bit: A data unit which must be in one of the two binary states described above. It is the smallest data unit that exists. |
| • Byte: 8 bits of data which has a possible value from 0 to 255. |
| 8 bit (1/0) : 1 Byte [1 character]
1024 bytes : 1 kilobyte 1024 KB : 1 megabyte 1024 MB : 1 Gigabyte 1024 GB : 1 Terabyte. |