The Opera browser is used for general Internet applications such as browsing the web, receiving and sending email messages, managing communications, online RCC chatting, downloading via Bit torrent protocol, and reading web feeds. Opera is available for free for computers, mobile phones, and tablets. Opera was launched as a research project at Telenor, Norway's largest telecommunications company. The main components of Opera are tab-based browsing, small features, page zoom, a variety of mouse pointer skins, and an integrated upload management section. In terms of security, Opera has in-house protection against phishing attacks and programs called malware, as well as the ability to stay safe when browsing websites and delete personal information such as cookies.