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WhatsApp

26:36

WhatsApp 2018 - In-depth Tutorial

0:51

How to add Whatsapp page to your Instant Messaging App?

2:54

WhatsApp PHP App

27:01

Whatsapp System Design: Chat Messaging Systems for Interviews

5:28

Instant Messaging from the Command Line - Finch & Hangups

WhatsApp Messenger is a freeware, cross-platform messaging and Voice over IP (VoIP) service owned by Facebook. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other media. WhatsApp's client application runs on mobile devices, but is also accessible from Windows and Mac desktop computers, as long as the user's mobile device remains connected to the Internet they use the desktop app. The service requires users to provide a standard cellular mobile number. Users could originally communicate only with individuals or informal groups on WhatsApp, but in January 2018, WhatsApp released a standalone business app targeted at small business owners, called WhatsApp Business, to allow companies to communicate with customers who use the standard WhatsApp client.
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