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2. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens. [1] [2] [3] Airlocks have a very similar design, allowing free ingress and egress ...

3. Direct-access storage device - Wikipedia

   en.wikipedia.org/wiki/Direct-access_storage_device

   Direct-access storage device. A direct-access storage device ( DASD) (pronounced / ˈdæzdiː /) is a secondary storage device in which "each physical record has a discrete location and a unique address". The term was coined by IBM to describe devices that allowed random access to data, the main examples being drum memory and hard disk drives. [1]

4. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   Common physical security access control with a finger print A sailor checks an identification card (ID) before allowing a vehicle to enter a military installation.. In physical security and information security, access control (AC) is the selective restriction of access to a place or other resource, while access management describes the process.

5. Rational DOORS - Wikipedia

   en.wikipedia.org/wiki/Rational_DOORS

   www-03 .ibm .com /software /products /de /de /ratidoor /. Rational Dynamic Object Oriented Requirements System (DOORS) (formerly Telelogic DOORS) is a requirements management tool. [4] It is a client–server application, with a Windows-only client and servers for Linux, Windows, and Solaris. There is also a web client, DOORS Web Access.

6. Trapdoor - Wikipedia

   en.wikipedia.org/wiki/Trapdoor

   Trapdoor. A trapdoor is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. [1] It is traditionally small in size. [2] It was invented to facilitate the hoisting of grain up through mills, however, its list of uses has grown over time. [3] The trapdoor has played a pivotal function in the operation of the ...

7. Platform screen doors - Wikipedia

   en.wikipedia.org/wiki/Platform_screen_doors

   Full-height doors on Tokyo Metro Namboku Line and Toei Mita Line Platform screen doors at the Ōsaka Station. The Tokyo Metro and Toei Subway began using barriers with the 1991 opening of the Namboku Line (which has full-height platform screen doors), and subsequently installed automatic platform gates on the Mita, Marunouchi, and Fukutoshin lines.