# IT:AD:CSS:LESS #
* [[../|(UP)]]
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Whereas SASS is a *server* side CSS Preprocessing language, LESS is a javascript based *client* side preprocessor.
That said, it can also be run on the server:
* [[IT/AD/Web/CSS/LESS/HowTo/Install/LESS/Server/Side]]
Used by:
* Twitter's [[IT/Backbone/]], so it ain't going anywhere soon.
* Though note that Bootstrap was ported to SASS: [http://thesassway.com/projects/sass-twitter-bootstrap](http://thesassway.com/projects/sass-twitter-bootstrap)
## Resources ##
* [http://lesscss.org/](http://lesscss.org/)
* [http://coding.smashingmagazine.com/2011/09/09/an-introduction-to-less-and-comparison-to-sass/](http://coding.smashingmagazine.com/2011/09/09/an-introduction-to-less-and-comparison-to-sass/)