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Internet Telephony
Internet Telephony is a communication service that allows a user to
make voice calls over the Internet to another user using a personal
computer equipped with speakers and microphone. Internet
Telephony services let you make video calls using a smartphone or
a webcam.
Skype, Viber, and WhatsApp are popular Internet telephony
services.
Skype
Newsgroups
A Newsgroup is a communication service which provides information on a
particular topic to the users. It is an electronic bulletin board where people can
post and read messages. The bulletin board is managed by a newsgroup server
that forwards the messages to all its users to view, comment on, or reply.
Messages in a newsgroup are not delivered instantly. Users need to visit the
newsgroup site regularly to get updates or latest information. Google News

Google News and Flipboard are popular newsgroup services.
Blogs

A Blog, or Weblog, is a website consisting of
frequently updated entries called posts. Blog posts
are arranged in a reverse chronological order with
the most recent entry appearing first. A blog can
contain text, images, audio, video, and hyperlinks
to other websites. A blog usually represents
the viewpoint and experiences of the author or
provides information about an organisation and
Blogger its products and services.

The process of creating, editing or maintaining a blog is called Blogging and the author of a blog is
called a Blogger. Some popular websites that offer blog services are WordPress, Blogger, and Tumblr.

Web Feeds
A Web Feed is a service that informs you when a website of your interest has new content to display.
Web feed helps you to stay updated with blogs, newsgroups and other websites. You can get all
updates at one place and visit the related website as per your leisure. Web feeds are also called
Really Simple Syndication feeds or RSS feeds.
Some popular web feed reader programs are Feedly, Feedbin, and NewsBlur.

SOCIAL NETWORKING

A Social Networking site is an online platform where users create their personal profiles to interact
with others to maintain personal and business relationships. Some popular social networking sites
are Facebook, Twitter, Snapchat, Instagram, and Pinterest.

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