I'm finding it surprising that many come down to a perspective/point-of-view:
- art/photo -> viewer perspective
- patsy -> false perspective
- data -> message start of protocol
- stack -> base address in memory
- mental -> selected dimensions/axes
- inertial -> selected origin point
Before I would have thought of a frame as a rough cropping of bounds (I'm no artist), but the precise positioning of edges and direction of view can alter the meaning in some.