Automatic Doors - Doors open only when activated and automatically close so to eliminate the doors being left open.

Door that opens and closes by sliding sideways instead of by swinging on hinges.

Dorma glass door sliding system,

is a type of sliding door in architecture and construction, is a large glass window opening in a structure that provide door access from a room to the outdoors, fresh air, and copious natural light. A sliding glass door is usually considered a single unit consisting of two panel sections, one being fixed and one a being mobile to slide open. Another design, a wall sized glass pocket door has one or more panels movable and sliding into wall pockets, completely disappearing for a 'wide open' indoor-outdoor room experience.