Code page 851 (CP 851, IBM 851, OEM 851) is a code page used under DOS to write Greek language. It covers the French and German as well. It is also called MS-DOS Greek 1.
It has been superseded by Code page 869.
Code page layout
The following table shows code page 851. Each character is shown with its equivalent Unicode code point and its decimal code point. Only the second half of the table (code points 128–255) is shown, the first half (code points 0–127) being the same as ASCII.
References
Code page 851 Wikipedia(Text) CC BY-SA