The user interface for the TouchPad is the familiar WebOS interface--all applications (or even parts of applications, such as an email message or a web page) are "cards." Selecting a card opens the app for interaction, although WebOS is a multitasking operating system. Apps that are meant to run in the background, like music, continue to run, while others may be suspended when you switch to another app. Gesturing left or right moves through these cards; when you're in an app (or a card), gesturing up minimizes or suspends the card. Flipping a card upward off the tablet quits the app.