Elektra is the name of a layout engine which was used for the Opera web browser for versions up to 6. It was replaced by the Presto layout engine in version 7. A layout engine, or rendering engine, is a software that takes web content (such as HTML, XML, image files, etc) and formatting information (such as CSS, XSL, etc) and displays the formatted content on the screen. ... Opera is a computer application for handling most common internet-related tasks, including: web browsing, sending and receiving messages, managing contacts and online chat. ... Presto is the name of the current layout engine for the Opera web browser developed by Opera Software. ...