The Cork encoding - named after the Irish city of Cork, where it was established in 1990 on the TUG conference - or T1 encoding is a character set encoding for LaTeX. It includes 256 characters and thus support both the Western and the Eastern European languages using the Latin alphabet.
Due to the peculiarities of the TeX program by Donald E. Knuth, the internal encoding and the encoding of the font used are coupled together. For this reason, the Cork encoding in many fonts for TeX is implemented. The reference implementation provide the ec fonts by Joerg squire. For many others, the Cork font encoding is implemented by virtual fonts.
The following table shows the coding differences to ISO 8859-1 highlighted in yellow.