Application management in a computing device

A computing device comprising:

• a processor;
• a touch-sensitive display screen coupled to the processor, the processor to receive gesture input on the touch-sensitive display screen and operate the computing device in any one of at least two display modes, wherein:
• during a given duration, the processor operates a plurality of applications concurrently, the plurality of applications including at least a first application, a second application, a third application, and a fourth application;
• in a full-screen mode, the processor provides, on the touch-sensitive display screen, a user interface for only one application of the plurality of applications;
• in a windowed mode, the processor:
• provides on the touch-sensitive display screen a plurality of cards in a two-dimensional arrangement along a first direction on the touch-sensitive display screen, the plurality of cards including at least a first card displaying a view of the first application, a second card displaying a view of the second application, a third card displaying a view of the third application, and a fourth card displaying a view of the fourth application;
• responds to a first directional contact along the first direction on the touch-sensitive display screen by moving the plurality of cards in concert with one another in the first direction;
• and
• responds to a second directional contact on a selected card of the first card, the second card, the third card, or the fourth card along a second direction that is different from the first direction on the touch-sensitive display screen by:
• identifying the selected card based on the second directional contact;
• moving the selected card along the second direction on the touch-sensitive display screen by dragging the selected card off the tough-sensitive display screen;
• and
• dismissing the selected card, responsive to dragging the selected card off the touch-sensitive display screen, in the second direction so that the corresponding application is closed;
• wherein the processor, in response to receiving user input, transitions the computing device at least (i) from the full-screen mode to the windowed mode, or (ii) from the windowed mode to the full-screen mode.