Standard ECMA-94
8-Bit Single-Byte Coded Graphic Character Sets - Latin Alphabets No. 1 to No. 4
2nd Edition (June 1986)

This ECMA Standard defines four 8-bit coded graphic character sets identified as Latin Alphabets No 1 to No 4, and specifies the coded representation of each character by means of a single 8-bit byte.
Characters common to two or more sets are allocated to the same code position. None of these characters are "non-spacing".
The use of control functions, such as BACKSPACE or CARRIAGE RETURN for the coded representation of composite characters is prohibited by this Standard.

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