Regular expressions are by far the most powerful tool for text manipulation and description, and they are well supported under Linux on many applications. Unfortunately, they are not supported at all (to my knowledge) by the most popular search engines because of their complexities. But, can you imagine how precise your search would be if you had the ability to describe the page you are looking for with a regular expression?
Giovanni Organtini (email@example.com) is a professor of Introduction to Computing and Programming for Physicists at the University of Rome. He has used Linux for years, both for fun and at work, where it is used for the simulation of the CMS experiment (cmsdoc.cern.ch) on large farms and as part of a complex data-acquisition system and machine control. Before the birth of his son, Lorenzo, he used to travel, seeking good restaurants and attending concerts and operas.