They strongly encouraged other groups to do the same. After some threats to release information on individuals, Lz0 returned to the old packaging ways for the time being until a new ruleset can be put in place. The Minor Update (MU) rule is unique to 0-day releases. It makes sure that each month not more than one release of the same application is released. Major updates do not follow this rule. The exception to the rule happens when a group motivates in their NFO that the changes are considered to be a major update. For example the group Unleashed choose to ignore the MU rule for a hotfix, making a less blurry game available two weeks sooner. PDA rules require folder naming to define which application and version the release contains. Also required are CPU type, operating system and cracktype. Optional information such as language is expected, if the release is non-English. Packaging follows 0day guidelines. Generally lax security, simple programming and small filesizes make mobile software an attractive target for infringers. In more recent times it covers other portable devices such as iPod, iPhone, iPad or systems running Android. ISO applications are usually either in BIN/CUE or ISO format. Allowed media is CD and DVD, but release can be smaller than the media size. Applications are required to contain working key or keygen to generate valid serial. Patch cracking is also required, which is used to bypass hardware protection, such as serial or USB dongle. Some groups signed a Sample CD Scene Protocol for better quality sample discs. Game rips This is the scene for game releases that are changed to minimize the size of the distributed files. A first ten point document was made by "The Faction" in 1998. The grouping that created the rules that should be adhered to, and the rules themselves, were disbanded the following year. The NSA rules, or "the new rules", outlines the codes of conduct regarding game ripping. Releasing can be done in two fields: games and applications. It can also be done in two ways: it is possible to release disc images or groups can "rip". In the process of ripping, groups remove things such as introductory movies, multiple texture modes, big sound files and the like. Games The game must fit on CDs or DVDs, and the format should be either BIN/CUE, or ISO, respectively. Some sites allow CCD images