They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. In most humans, the concentration of pacemaker cells in the sinoatrial (SA) node is the natural pacemaker, and the resultant rhythm is a sinus rhythm. Sometimes an ectopic pacemaker sets the pace, if the SA node is damaged or if the electrical conduction system of the heart has problems.
Lobo is an extensible all-Java web browser and RIA platform. It supports HTML 4, Javascript (AJAX) and CSS 2 plus direct JavaFX and Java (Swing/AWT) rendering. Cobra is the web browser's renderer API; also a Javascript-aware HTML parser.
After years as the top mobile Web browser, Opera has fallen to Android's built-in Web browser. StatCounter's mobile Web browser numbers show Android's native browser taking first place from Opera. On the PC, Internet Explorer (IE), while declining for years, is still the top Web browser. On mobile devices, though, IE has never mattered, and Opera has long been the top dog. But, that's no longer the case.