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.
The major web browsers are Internet Explorer, Firefox, Google Chrome, Safari, and Opera. A browser is a software application that provides users with a way to view and interact with information on the Internet. 5 Browsers which is mostly used by the peoples are: 1. Google Chrome 2. Internet Explorer 3. Mozilla Firefox 4. Opera 5.