Design ideas for evolving notifications in the context of multiple devices: “actionable notifications,” treating them as new objects in the time stream of a user’s PDI. (post for a PDF download).

Smartphones should not interrupt users’ video recording sessions when calls come in, especially if users choose to ignore those calls, whether through inaction or via tapping "ignore" on a notification. Yet, this is what …

Usage is the best identifier of a person's device ecosystem, not the devices' manufacturers.