What's going on when we search for *.docx? Dr Steve Bagley talks us through wild cards. EXTRA BITS: https://www.youtube.com/watch?v=M-yJYfvZRv8 http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/