On Tuesday, Google introduced a mobile version of Google+, the search giant's new social networking service, for the iPhone.
Last year, Sling introduced a mobile version of its product, which enables consumers to stream video over smartphones or hand-held personal computing devices.
But the service has primarily been Web-based, although the company recently introduced a mobile version of the service for Android devices.
Chatter about such a product first surfaced several years ago, when Google introduced a mobile version of its maps program.
Google just introduced a mobile version of its AdSense network, which provides contextual keyword ads, on Sept. 18.
In 2011, the widget maker Zeo introduced a mobile version to its Sleep Manager product line.
MindBites, a paid-content instructional video site that launched earlier this year, has introduced a mobile version that allows users to stream guides to their iPhones.
Castlight is working on a mobile version of the service to introduce next year so people can access the information from the exam table.
Ralph Lauren announced last week a mobile version of its online store, and Chanel introduced its own iPhone application last month that offers video from its fall haute couture show, as well as the ability to direct-dial stores that carry Chanel around the world.
The Redmond giant introduced its first tablet PC more than a decade ago, and it was offering a mobile version of Windows for years before the iPhone came on the scene.
A mobile version is planned.
