In this tutorial, you are going to learn about QR Code. QR is short for Quick Response. It is a barcode which is known as matrix barcode (or two-dimensional code), readable by smartphones, mobile phones with a digital camera, and QR scanners.
In this tutorial, you are going to learn how to use a virtual chat room. A virtual chat room is where you can send and receive short text messages send to one or more people while online with any particular topic. This tutorial will show you that how to use a virtual chat room without registration.
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