所謂電子訂購，乃是訂戶與廠商彼此間利用電子媒體(如磁片)與通訊(如分封網路)作為雙方訂購資料的往來處理與交換。鑑於訂購資料缺乏標準的交換格式，圖書工業系統諮議委員會(Book Industry Systems Advisory Committee, 簡稱BISAC)與期刊工業系統諮議委員會(Serial Industry Systems Advisory Committee, 簡稱SISAC)分別制定BISAC、SISAC格式，作為傳輸訂單資料的交換格式，以利此種需求的應用。本文主要目的即是簡介前述兩種格式的架構，最後作者論述圖書館自動化作業、Internet網路應用與電子訂購格式間的看法。 The teleordering has few different names like online ordering, electronic orders and online acquisition, etc. We caIled teleordering because both the customers and vendors use electronic data to deal with orders. Now there're fax, email, leased line and online ways to accomplish this. Due to lack of standard exchange format for teleordering, the Book IndustrySystems Advisory Committee and Serial Industry Systems Advisory Committee have been designing the format of BISAC and SISAC as a standard format to achieve to exchange teleordering data. This article is to make a brief introduction to these two formats. Finally, the author presents his review to the relationship among the applications of library automation, Internet and BISAC/SISAC formats.