But the lines among devices have blurred.
The theory is that the distinctions among devices have blurred.
Music that you did not purchase from iTunes can still be shared among devices and backed up in the cloud.
Another result emerges from a comparison of fragmentation by country: the larger the per-capita GDP (output per person), the greater the OS fragmentation among devices.
The Organization for Economic Cooperation and Development, meanwhile, released a report on Friday warning that difficulties in transferring digital files among devices hindered the development of content.
As I have noted in the past, Twitter-owned applications had been largely inconsistent, showing different colors, logos and design among devices.
Mr. Droege said Taser was attracted to the expertise that Familiar had in creating a consumer-friendly service for securely moving video and images among devices.
Quick Calls Catch Notes, a popular (and free) Android and iPhone app for sharing files and notes among devices, now offers a premium version, Catch Pro.
In 2007, Apple released MobileMe, its previous effort at so-called cloud computing, which allows people to share contacts, calendars and e-mail among devices.
Among devices sold to control mosquitoes in yards, the bug zapper, which attracts insects with black light, is probably the most popular (four million sold in four years) and least effective.
In a blog post announcing the full extent of the changes, Google's tech lead Eddie Kessler said: "If you're anything like me, you move among devices and Google products on a regular basis.
