l western alphabet (single byte character set)
l Asian character set (double byte character set).
1A，2B, 3C, 4D, 5E, 6F, 7G, 8H, 9I, 10J, 11K, 12L, 13M, 14N, 15O, 16P, 17Q, 18R, 19S, 20T, 21U, 22V, 23W, 24X, 25Y, 26Z
Representing Text (single byte)
- A convention is needed for how to represent text
- Simplest solution: Use one byte per character
- o Allows to represent 256 different characters (including control characters)
- o Example: <4B> is 'K', <65> is 'e', <69> is 'i', <6F> is 'o', thus <4B><65><69><6F> stands for 'Keio' (A)
- o Another example: <D2> is 'K', <85> is 'e', <89> is 'i', <96> is 'o', thus <D2><85><89><96>stands for 'Keio' (E)
- Standard for character encoding is indispensable to make storage and communication work
- The above examples use ASCII (A, most computers) and EBCDIC (E; IBM mainframes)
- For 'basic English', 7 bits would be enough
- 8 bits are enough for various European regions/languages
A double-byte character set (DBCS), →"expanded 8-bit character set"