(1) (OPERA) (Open PLC European Research Alliance) A research consortium dedicated to expanding power line communications (PLC) throughout Europe. For more information, visit www.ist-opera.org. See PLC.

(2) (Opera) A Web browser for Windows, Mac and Linux from Opera Software, Oslo, Norway (www.opera.com). Developed at Telenor (Norwegian Telecom) in 1994 and commercialized by Opera in 1995, it is noted for its fast rendering of Web pages. Opera was the first browser to offer a host of unique features such as enlarging text and graphic elements on the page and displaying multiple windows with only one instance of the program running. Having both paid and ad-supported versions, in late 2005, the paid version was also made free.

For Cellphones and PDAs
Opera Mobile and Opera Mini are versions for cellphones and PDAs. The Opera Platform is for developers who want to offer advanced Web applications on mobile phones.