Code page 857 (CP 857, IBM 857, OEM 857) is a code page to be used under MS-DOS to write Turkish language. Code page is the traditional IBM term used for a specific character encoding table: a mapping in which a sequence of bits, usually a single octet representing integer values 0 through 255, is associated with a specific character. ... Microsofts disk operating system, MS-DOS, was Microsofts implementation of DOS, which was the first popular operating system for the IBM PC, and until recently, was widely used on the PC compatible platform. ... Turkish (Türkçe) is a Turkic language spoken natively in Turkey, Cyprus, Bulgaria, as well as by several million immigrants in the European Union. ...

CP857 is based on CP850, but with many changes. It includes all characters from ISO 8859-9. The code page 850 is a code page which was used in occidental Europe, under systems such as DOS. It has been largely replaced with ISO 8859-1 and UTF-8, but is still sometimes used. ... ISO 8859-9, also known as Latin-5 or Turkish, is an 8-bit character encoding, part of the ISO 8859 standard. ...

Code page layout

Only the upper half (128–255) of the table is shown, the lower half (0–127) being plain ASCII. There are 95 printable ASCII characters, numbered 32 to 126. ...