Ruby, Perl, R, Bash

A comparison of some programming languages, couldn't add python because it's not recognised as a programming language by the Google trend website.

The trend for one keyword is relative to all other searchers over the same time period. The decreasing trend of Perl in this graph does not mean that searches for Perl decreased in absolute number. It means that the proportion of these searches to the overall Google searches was decreasing. How Trends data is adjusted.