programming languages

1. C Language

2. C++

2.1. - Safari - Amazon - Microsoft office

3. Objective-C

4. PHP

5. Python

5.1. - Youtube - Spotify - Dropbox

6. Java

6.1. - Eclipse - NetBeans - jEdit - OpenOffice

7. Ruby

7.1. - 500px - Airbnb - A list apart

8. SQL

9. JavaScript