what is Whatsapp ?

WhatsApp is a messaging service for smart phones. User can send each other text massages,pictures,audio and video massages. This software is available for  Google android operating system , Apple OS,blackberry OS,selected some nokia series like series 40, symbian platform , nokia asha platform and Microsoft windows phones. It was founded in the year of 2009 by Brian Acton and Jan koum,both of them were the employees of Yahoo! . Headquarter of WhatsApp is situated at mountainview, California,USA. WhatsApp  handled ten billion messages per day in August 2012, growing from two billion in April 2012,and one billion the previous October.On June 13, 2013, WhatsApp announced that they had reached their new daily record by processing 27 billion messages According to the Financial Times,As of November 10, 2013, WhatsApp had over 190 million monthly active users, 400 million photos are shared each day, and the messaging system handles more than 10 billion messages each day. In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.

On February 19, 2014, Facebook inc. announced it is acquiring WhatsApp Inc. for US$19 billion.Facebook will pay $4 billion in cash, $12 billion in Facebook shares and $3 billion in restricted stock units to be granted to WhatsApp founders and employees that will vest over four years.