Open Computer Network
 OCN (オーシーエヌ) or Open Computer Network is the largest Japanese Internet service provider with over 7 million subscribers. It is owned by NTT Communications Corp one of the largest telecommunication companies in the world. It offers dial-up and ISDN DSL up to 50 Mbit/s and fiber up to 200 Mbit/s(download)100Mbits/s (upload) for ¥7500 (US$76.33) per month.