CTSNet is far and away the premier international destination for online networking and educational enrichment in the field of cardiothoracic surgery. Over 40,000 cardiothoracic surgery professionals, almost 28,000 of whom are surgeons, are registered users of CTSNet.org. The mission of CTSNet is to “Connect the global cardiothoracic community.” CTSNet is an access point to the specialty’s major journals and a huge repository of outstanding text-based and multimedia clinical resources, but—far beyond that—it is a bona fide online community of cardiothoracic surgery professionals, specialty-dedicated associations, and industry groups. Critically, it is where cardiothoracic surgeons go on the web to learn about new techniques, connect with their colleagues, and stay apprised of the latest research on devices and procedures.