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CTSS and Multics
CTSS, which stands for Compatible Time-Sharing System, was one of the first time-sharing operating systems; It was developed at the MIT Computing Center. -
Protcolo p2p
The p2p protocol is created that sends and receives private messages when connecting to the same computer. -
CompuServe CB Simulator
It was the first dedicated online chat service that was widely available to the public. -
Quantum Link
Quantum Link was an American and Canadian online service for the Commodore 64 and 128 personal computers -
Internet Relay Chat
IRC is a text-based, real-time communication protocol that allows discussions between two or more people. -
Windows Live Messenger
Windows Live Messenger was an instant messaging client created by Microsoft and designed to work on Microsoft Windows PCs, Windows Phone mobile devices, iOS and Android, among others. -
Facebook
It is an American social media conglomerate based in Menlo Park, California. It was founded by Mark Zuckerberg, along with his Harvard roommates and students, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes, originally as TheFacebook.com -
WhatsApp
is an instant messaging application for smartphones, in which messages are sent and received via the Internet, as well as images, videos, audios, audio recordings (voice notes), documents, locations, contacts, gifs, stickers, as well as calls and video calls with several participants at the same time, among other functions. -
Instagram
Instagram is an application and social network of American origin, owned by Facebook, whose main function is to be able to share photos and videos with other users. It is available for Android, iOS and Windows 10 devices. -
kik
Kik, known in English as Kik Messenger, is a free instant messenger application for mobile devices. The application is available on most operating systems: iOS, Android, Windows Phone, BlackBerry and Symbian. -
Line
Line is a messaging application for mobile phones, PC and Mac. In addition to basic messaging, you can send pictures, videos, audio messages and make VoIP calls. -
Hangouts
Hangouts is a multiplatform messaging application developed by Google Inc. It was created to replace the Google Talk, Google+ Messenger and Google+ Hangouts services, unifying all these services in a single application -
Telegram
Telegram is a messaging and VOIP platform, developed by the brothers Nikolái and Pável Dúrov. The application is focused on instant messaging, sending multiple files, and mass communication.