Torrent is a small file which contains metadata about the files to be shared, and about the tracker, the computer that coordinates the file distribution. Rapidshare means the file is hosted at Rapidshare.com which is a filehosting site. Megaupload means the fie is hosted at megaupload.com crack is a modified executable or more (usually one) and/or a library (usually one) or more and/or a patch designed to turn a trial version of a software package into the full version and/or bypass anti-piracy protections. Serial is a registration key. keygen is a file having a bunch for serial numbers. patch is a fix for the software. NoCD is a file modification that allows an installed program to be run without inserting the CD or DVD into the drive. DVDRip is a Bootlegged movie copy made directly from a DVD-Video disc and encoded into some other format, like SVCD or DivX