Specifies the track format characteristics for the six-disk pack to be used for data interchange (see ISO 2864). The 7-bit coded character set specified in ISO 646 has been adopted, though, by agreement between the interchange parties, the 7-bit or 8-bit extensions specified in ISO 2022 may be used.
定价: 418元 / 折扣价: 356 元 加购物车
Specifies the track format characteristics for the single-disk cartridge (top loaded) to be used for data interchange (see ISO 3562). The 7-bit coded character set specified in ISO 646 has been adopted, though, by agreement between the interchange parties, the 7-bit or 8-bit code extensions specified in ISO 2022 may be used. However, it should be noted that in this International Standard plain binary numbers in 8-bit bytes are used in the control field to define the control information.
定价: 418元 / 折扣价: 356 元 加购物车
Specifies both the form and interpretation of computer programs written in PL/I. Is intended to provide a high degree of machine independence and thereby facilitate program exchange among a variety of computing systems. The standard serves as an authoritative reference rather than as a tutorial exposition.
定价: 570元 / 折扣价: 485 元 加购物车