small katakana characters to positions 0xA7-0xAF. In 1966, the fourth draft of ISO specified the national currency symbol at 0x24, and the JIS committee planned to map the yen sign. The first edition of ISO 646 was published in 1967. It specified the ASCII's dollar sign 0x24 as an invariant character, so the JIS committee decided to replace the ASCII's backslash 0x5c (one of variant characters) with the yen sign. JIS C 6220 (Codes for information interchange, 情報交換用符号) was published in 1969. Its number was changed to JIS X 0201 due to the JIS category reform in 1987, and the name was changed to 7-bit and 8-bit coded character sets for information interchange (7ビット及び8ビットの情報交換用符号化文字集合) in the 1990 edition. The character set of JIS X 0201 had been widely used in Japan. The Nationwide Banking Data Communication System (全国銀行データ通信システム), the largest funds transfer system in Japan, was established in 1973. Transaction messages between banks used a subset of JIS X 0201. The system was used until 2018, and it was replaced by the ZEDI (The Nationwide Banking Electronic Data Interchange System, 全銀EDIシステム) which could handle hiragana and kanji characters. In 1978, the JIS C 6226 (JIS X 0208) 2-byte character set was developed to express hiragana and kanji characters. It includes katakana characters, but their codes and layout are different from JIS X 0201. Computer manufacturers developed their own extensions of JIS X 0208 to retain compatibility with JIS X 0201. In 1982, the Microsoft Kanji encoding scheme (Codepage 932 of MS-DOS) and Digital Research's SJC26 (for Japanese CP/M-86) were developed to combine JIS X 0201 single-byte encoding and JIS X 0208 double byte encoding without shift out and shift in characters. They were called Shift JIS, which became the industrial standard for personal computers. Implementation details The first half (Roman set) of JIS X 0201 constitutes a Japanese variant of ISO 646, amounting to ASCII with backslash (\) and tilde (~) replaced by yen (¥) and overline (‾), while the second half (Kana set) consists mainly of katakana. Control characters are specified in JIS X 0211. In the 7-bit format, the shift out control character (0x0E) switches to the Kana set and shift in (0x0F) switches to the Roman set. In the 8-bit format, given in the chart below, bytes with the most significant bit set (i.e. 0x80–0xFF) are used for the Kana set and bytes with it unset (i.e.