CSS programming language

 The complete meaning of CSS is Cascading style Sheet.  It is a programming language. It is a technology of world wide web along with other two programming language HTML and Javascript. CSS is used as a styling sheet to specifying the presentation of mark up language documents. 

CSS is such types of programming language that enables the separation of content and presentation.  Just for example, layout of any website. CSS ensures easy and flexible accessibility of content. It enabled to form multiple webpage. 

Javascript

 Javascript is a programming language with first class function which is lightweight interpreted or Just in time compiled.

Most of the case Javascript is used browser based function.  But in some case of non browser based function Javascript is uses. Just for example adobe acrobat.

Very wide function of Javascript is web page development.  It is the technology of web development along with other programming language like CSS and HTML. 

It is widely used programming language on GitHub.