Opera's Wonderful Search Engine List
Opera has many innovative features. I love the ability to type say
"g mysql" into the address bar and directly search Google, without the need to go to Google first. Opera comes with a set of these search engine shortcuts already set up.
But I've also learned how to set up my own eg Wikipedia where I type "wk columbus" to search for Columbus.

Today I've learned how easy it is to set these up, go to your favorite search engine say to search for a description of a PHP function, right-mouse click in the Search Box and choose "Create Search" name the search say "php" you can now type say
"php ucfirst" into your Opera URL/Address bar to directly access the PHP page on ucfirst.

You can also highlight the text on any webpage and send it to the search engine of your choice (right-mouse click to select Search Engine)!!