What is the difference between the four types of Shift JIS encoding?
There are four types of Shift-JIS encoding available (although you may need to customize the encoding list to see them all). Japanese (Shift JIS) contains the half-width alphanumeric characters, symbols, and katakana, along with JIS X0208 (JIS 1&2) characters. Japanese (Mac OS) contains all of Japanese (Shift JIS) along with some Mac-specific symbols. Japanese (Windows, DOS) contains all of Japanese (Shift JIS) along with some Windows-specific symbols. Japanese (Shift JIS X0213) contains all of Japanese (Shift JIS) along with kanji specified in JIS 3&4 for a total of 13,000 characters total. Japanese text created in Classic OS is encoded in Japanese (Mac OS), so this is the safest option among the various Shift JIS encodings.