The Nokia N73 is a smartphone by Nokia officially described as a "multimedia computer". In common with other Nokia 'Nseries' and 'Eseries' phones of its time (late 2006), the N73 comes loaded with many software applications, including contacts, messaging, picture and video galleries, a music player, a Visual FM Radio, RealPlayer, an IM client, a WAP browser, a full web browser based on KHTML/WebKit, a Microsoft Office document viewer, a PDF viewer, an Adobe Flash Lite viewer and some games. The majority of these applications support background execution; for example, one may listen to music while browsing the Internet, and then may switch to write a text message or e-mail, without having to close any applications. With the exception of newer Sony Ericsson phones like K550 and W610, smartphones' typically cannot do this or can do it in only a very limited way; for example, only the music player can run in the background. The feature which most distinguishes the N73 from other 'N'- or 'E'-series Nokia mobile psport Wi-Fi.