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2. Laptop charging trolley - Wikipedia

   en.wikipedia.org/wiki/Laptop_charging_trolley

   Laptop charging trolleys, also known as laptop trolleys or laptop carts, are mobile storage containers to charge laptops, netbooks and tablet computers en masse. The trolleys are predominantly used in schools that have replaced their traditional static ICT [ 1 ] suites of desktop computers with laptops, but do not have enough plug sockets in ...

3. A smart shopping cart? Here's what we found when we ... - AOL

   www.aol.com/smart-shopping-cart-heres-found...

   Sure, the build of the cart feels a little heavier than your average metal rolling bin. And yes, it lights up like a Christmas tree when you put an item in the basket. Don’t be alarmed.

4. Linear-motion bearing - Wikipedia

   en.wikipedia.org/wiki/Linear-motion_bearing

   A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings.. Motorized linear slides such as machine slides, X-Y tables, roller tables and some dovetail slides are bearings moved by drive mechanisms.

5. Carousel slide projector - Wikipedia

   en.wikipedia.org/wiki/Carousel_slide_projector

   A carousel slide projector. The example pictured is a Kodak Carousel model 4400, dating from the mid-1980s. A carousel slide projector is a slide projector that uses a rotary tray to store slides, used to project slide photographs and to create slideshows. It was first patented on May 11, 1965, by David E. Hansen of Fairport, New York.

6. Sliding door - Wikipedia

   en.wikipedia.org/wiki/Sliding_door

   A bottom-rolling system consists of two rollers (sometimes called a sheave) at the bottom of the door running on a track, and two guides at the top running in a guide channel. As all the weight of the door is concentrated on the two bottom wheels, more force is needed to move the door than on a top-hung system. [citation needed]

7. Laptop - Wikipedia

   en.wikipedia.org/wiki/Laptop

   Laptop charging trolleys, also known as laptop trolleys or laptop carts, are mobile storage containers to charge multiple laptops, netbooks, and tablet computers at the same time. The trolleys are used in schools that have replaced their traditional static computer labs [ 63 ] suites of desktop equipped with "tower" computers, but do not have ...