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IBM 37xx (or 37x5) is a family of IBM Systems Network Architecture (SNA) programmable communications controllers used mainly in mainframe environments. All members of the family ran one of three IBM-supplied programs. *''Emulation Program'' (EP) mimicked the operation of the older IBM 270x non-programmable controllers. *''Network Control Program'' (NCP) supported Systems Network Architecture devices. *''Partitioned Emulation Program'' (PEP) combined the functions of the two. ==370x series== * 3705 — the oldest of the family, introduced in 1972 to replace the non programmable IBM 270x family. The 3705 could control up to 352 communications lines. * 3704 was a smaller version, introduced in 1973. It supported up to 32 lines. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IBM 37xx」の詳細全文を読む スポンサード リンク
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