Posted in Business & Finance, Information Technology, Organizations YISI stands for York Internet Services, Inc. (Pennsylvania) YISI stands for Young Israel of Staten Island (New York) YISI Share Pinterest Tweet Whatsapp Post navigation YISHYISK Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.