A CD/DVD reader uses a laser beam to read the data on the disk. This laser beam crosses the protective plastic layer and reads the real recording metal layer. If the protective plastic layer is scratched, the laser will be unable to pass resulting in non-readable disc.  >>>>> Read the full post

1. The number one hack for Flickr would have to be Flickrleech. Flickrleech is a site developed by Andrew Houser (who is also a kick ass photographer), or simply Houser as he is often called, with the tagline, “because paging sucks.”  >>>>> Read the full post