Facebook is a social networking site launched in 2004 by Mark Zuckerberg and fellow Harvard students. It allows users to create profiles to connect with friends and family and share photos, messages, and interests. Though originally only for Harvard students, Facebook expanded to other universities and eventually anyone. It has grown to over 200 million users worldwide who spend more than 3.4 billion minutes on the site daily connecting and sharing with others.

2. WHAT IS FACEBOOK ?
 Facebook is a social networking site.
 Facebook is a free service that allows you to create
an online page to connect with family, friends, or
make new friends with anyone and anywhere.
 On your facebook page you can share pictures,
personal information, messages, videos, join groups,
and add applications.

3. INTRODUCTION TO FACEBOOK

4. Facebook is an American online social media and social
networking service company based in Menlo Park, California. Its
website was launched on February 4, 2004, by Mark Zuckerberg,
along with fellow Harvard College students and roommates
Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris
Hughes.
The founders initially limited the website's membership to
Harvard students. Later they expanded it to higher education
institutions in the Boston area, the Ivy League schools, and
Stanford University. Facebook gradually added support for
students at various other universities, and eventually to high
school students.

5. HISTORY
 2003–2006: Thefacebook, Thiel investment, and name change
 Zuckerberg wrote a program called "Facemash" in 2003 while attending Harvard
University as a sophomore (second year student). According to The Harvard
Crimson, the site was comparable to Hot or Not and used "photos compiled
from the online facebooks of nine Houses, placing two next to each other at a
time and asking users to choose the "hotter" person". Facemash attracted 450
visitors and 22,000 photo-views in its first four hours online. The Facemash site
was quickly forwarded to several campus group list-servers, but was shut down
a few days later by the Harvard administration.
 Zuckerberg faced expulsion and was charged by the administration with breach
of security, violating copyrights, and violating individual privacy. Ultimately, the
charges were dropped. Zuckerberg expanded on this initial project that
semester by creating a social study tool ahead of an art history final exam. He
uploaded all art images to a website, each of which was featured with a
corresponding comments section, then shared the site with his classmates, and
people started sharing notes.

6. WEBSITE
 The website's primary color is blue as Zuckerberg is red-green colorblind, a
realization that occurred after a test undertaken around 2007; he explained
in 2010: "blue is the richest color for me—I can see all of blue. Facebook is
built in PHP which is compiled with HipHop for PHP, a "source code
transformer" built by Facebook engineers that turns PHP into C++. The
deployment of HipHop reportedly reduced average CPU consumption on
Facebook servers by 50%.
 Facebook is developed as one monolithic application. According to an
interview in 2012 with Chuck Rossi, a build engineer at Facebook, Facebook
compiles into a 1.5 GB binary blob which is then distributed to the servers
using a custom BitTorrent-based release system. Rossi stated that it takes
about 15 minutes to build and 15 minutes to release to the servers. The build
and release process has zero downtime and new changes to Facebook are
rolled out daily.

7. ADVANTAGES AND DISADVANTAGES
OF FACEBOOK
ADVANTAGES
 Facebook for business.
 Video chatting.
 Image and video hosting.
 News and Information.
 As a personal portfolio.
DISADVANTAGES
 Facebook privacy.
 Private status published policy.
 Fake Facebook profiles.
 Time consuming.

8. SOME FACTS
 Facebook has 200 over million users.
 Over 70% of facebook users are outside the United States.
 The average person has 120 friends on facebook.
 More than 3.4 Billion minutes are spend on facebook each
day.
 The fastest growing demographic is those 35 years old and
older.
 Slogan “ Facebook “ helps you connect and share with the
people in your life.

9. THANK YOU