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  2. Rolling code - Wikipedia

    en.wikipedia.org/wiki/Rolling_code

    Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.

  3. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again.

  4. Email Support-AOL Help

    help.aol.com/email-support

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  5. Soviet submarine K-222 - Wikipedia

    en.wikipedia.org/wiki/Soviet_submarine_K-222

    K-222 was the sole Project 661 "Anchar" (Cyrillic: Анчар) (NATO reporting name: Papa class) nuclear-powered cruise-missile submarine of the Soviet Navy during the Cold War. Although the Soviets saw K-222 as an unsuccessful design, upon completion it was the world's fastest submarine and the first to be built with a titanium hull.

  6. Logic gate - Wikipedia

    en.wikipedia.org/wiki/Logic_gate

    A NAND gate is equivalent to an OR gate with negated inputs, and a NOR gate is equivalent to an AND gate with negated inputs. This leads to an alternative set of symbols for basic gates that use the opposite core symbol (AND or OR) but with the inputs and outputs negated. Use of these alternative symbols can make logic circuit diagrams much ...

  7. O'Day 222 - Wikipedia

    en.wikipedia.org/wiki/O'Day_222

    The O'Day 222 is an American trailerable sailboat that was designed by C. Raymond Hunt Associates as a cruiser and first built in 1984. [ 1 ] [ 2 ] [ 3 ] The O'Day 222 replaced the O'Day 22 in the company product line.

  8. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    A limit switch with a roller-lever operator; this is installed on a gate on a canal lock, and indicates the position of a gate to a control system A limit switch mounted on a moving part of a bridge. In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object.

  9. List of Room 222 episodes - Wikipedia

    en.wikipedia.org/wiki/List_of_Room_222_episodes

    The following is a list of episodes of the television drama series Room 222. Series overview Season Episodes Originally released Rank Rating First released Last released 1 26 September 17, 1969 (1969-09-17) March 18, 1970 (1970-03-18) — — 2 26 September 23, 1970 (1970-09-23) April 7, 1971 (1971-04-07) — — 3 23 September 17, 1971 (1971-09-17) March 3, 1972 (1972-03-03) 28 19.8 [a] 4 23 ...