In SNA, a field in a FID 0 or FID 1 transmission header that contains the address of the originating network addressable unit(NAU).; 在系統(tǒng)網(wǎng)絡(luò)體系結(jié)構(gòu)(SNA)中,格式標(biāo)識符0或格式標(biāo)識符1傳送報頭中的一個字段, 它包含發(fā)信網(wǎng)絡(luò)可尋址單元(NAU)的起始地址。對照destination address field。 參閱format identification (FID) field, localsession identification (LSID), origin address field prime (OAF'), origin element field (OEF), origin subarea field (OSAF)。