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.
List of Web Browsers That Support Java Applets. Java applets are small Java applications that run inside a web browser window. These applications can do anything from simple database calls on up to managing a persons finances. Since the applets are run in a web browser, they can be run across multiple platforms such as Windows, Mac OS X and Linux.