Search reference documentations with DuckDuckGo

DuckDuckGo is a search engine recommended by Linux Mint and PC-BSD. The features of DuckDuckGo are:

• Aggregates results of Google, Bing and so forth
• Able to copy link directly in result pages
• DO NOT TRACK

And, one more useful feature for IT developers is "Reference Zero-click Info Sources". For instance, DuckDuckGo show results for supported language and for supported command like below:

Please Check supported languages and commands in this page.

But, DuckDuckGo also show results for unsupported languages in its own way if you use ! notations:

If you favorite this, please type https://duckduckgo.com/ or ddg.gg in your address bar!