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2. Smart doorbell - Wikipedia

   en.wikipedia.org/wiki/Smart_doorbell

   A smart doorbell is an internet-connected doorbell that notifies the home owner on his or her device (smartphone or any other gadget) when a visitor arrives at the door. It activates when the visitor presses the button of the doorbell, or alternatively, when the doorbell senses a visitor with its built-in motion sensors. The smart doorbell lets ...

3. Doorbell - Wikipedia

   en.wikipedia.org/wiki/Doorbell

   Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]

4. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   firefox-startpage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

5. David O. Sacks - Wikipedia

   en.wikipedia.org/wiki/David_O._Sacks

   David Oliver Sacks (born May 25, 1972) [1] is a South African-American [2] entrepreneur, author, and investor in internet technology firms. He is a general partner of Craft Ventures, a venture capital fund he co-founded in late 2017.

6. Bulletin board system - Wikipedia

   en.wikipedia.org/wiki/Bulletin_board_system

   A welcome screen for the Free-net bulletin board, from 1994. A bulletin board system (BBS), also called a computer bulletin board service (CBBS), [1] is a computer server running software that allows users to connect to the system using a terminal program.

7. Amazon Alexa - Wikipedia

   en.wikipedia.org/wiki/Amazon_Alexa

   Amazon Alexa, or, Alexa, [2] is a virtual assistant technology largely based on a Polish speech synthesizer named Ivona, bought by Amazon in 2013. [3] [4] It was first used in the Amazon Echo smart speaker and the Amazon Echo Dot, Echo Studio and Amazon Tap speakers developed by Amazon Lab126.