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2. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or ...

3. Infrastructure of Changi Airport - Wikipedia

   en.wikipedia.org/wiki/Infrastructure_of_Changi...

   There are a total of 21 contact gates and 8 bus gates in Terminal 4, numbered Gates G1 to G21 and Gates H1 to H8. Gates G1 to G17 can only be used by single-aisle aircraft such as the Airbus A320 & Boeing 737, while Gates G18 to G21 can be used by both single-aisle & wide-bodied aircraft. Single-aisle aircraft can also utilise the Multiple ...

4. Porte-cochère - Wikipedia

   en.wikipedia.org/wiki/Porte-cochère

   An ornate 19th-century porte-cochère, at Waddesdon Manor A modern example at a hospital. A porte-cochère (/ ˌ p ɔːr t k oʊ ˈ ʃ ɛ r /; French: [pɔʁt.kɔ.ʃɛʁ]; lit. ' coach gateway '; [1] pl. porte-cochères or portes-cochères) [2] is a doorway to a building or courtyard, "often very grand," through which vehicles can enter from the street [3] or a covered porch-like structure at ...

5. Garage door opener - Wikipedia

   en.wikipedia.org/wiki/Garage_door_opener

   A residential garage door opener. The motor is in the box on the upper-right. A garage door opener is a motorized device that opens and closes a garage door controlled by switches on the garage wall. Most also include a handheld radio remote control carried by the owner, which can be used to open and close the door from a short distance.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Rolling code - Wikipedia

   en.wikipedia.org/wiki/Rolling_code

   Rolling code. A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent a simple form of replay attack, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'. Such systems are typical in garage door openers and keyless car entry systems.