Computer Awareness and IT- List of OS,Browsers,Sites,Email,Search Engines

List of Operating  Systems
Microsoft
Linux
Ubuntu

List of Mobile Operating Systems
Android
Windows Phone OS
Symbian
Blackberry OS
BADA
Maemo

List of Web Browsers
Chrome
Mozilla Firefox
Edge
Safari
Internet Explorer
Mosaic
Opera

List of  Email Clients
Gmail
Yahoo mail
Microsoft Office Outlook
Thunderbird
Seamonkey

List of Social networking Sites
Facebook
Twitter
LinkedIn
Google+
Tumblr

List of search Engines
Google
Yahoo
Bing
Ask
Baidu