Echocardiography. Org is an Internet publishing company and book/video retailer founded in 1998 to fulfill a need for distance-learning in the field of transesophageal echocardiography, a medical diagnostic technique.The company was originally conceived as an MBA-project by its physician-founder.Core features:1. Pre-assigned list of RR Bowker-assigned International Standard Book Numbers(ISBN)2. On-line account for assignment of ISBN numbers(user name and password)3. On-line account for Library of Congress Preassigned Card Catalogue(PCN) applications4. AcqWeb Directory of Publishers listing5. "Sticky-content" web site with registered URL and "Real-name"6. Additional e-commerce presence on major Internet retailers