關於「ESN」標籤，搜尋引擎有相關的訊息討論：

ESN Aveiro (@ESNAveiro) / Twittertwitter.com › esnaveiroESN International on Twitter: "Thousands of international students to ...mobile.twitter.com › esn_int › statusStudent Guidebook: Studying and Training Abroadwww.esn.org › studentguidebook[PDF] 標準氣壓缸DSNU/DSN/ESNU/ESN, 符合ISO