These roles are applicable at the domain level (i.e., there is one of each for every domain in a forest): The PDC Emulator (Primary Domain Controller) - This role is the most used of all FSMO roles and has the widest range of functions. The domain controller that holds the PDC Emulator role is crucial in a mixed environment where Windows NT 4.0 BDCs are still present.
iPod touch 7th Generation Release Date. It has been noted that iPod touch 7th generation release date will be in the mid (July-September) 2017. The new iPod touch 7G release is expected to be the biggest iPod launch that apple has ever done.
Apple is also expected to reveal several other products, including a new iPad Pro and a new Apple TV. Apple's keynote event begins in San Francisco at 10 a.m. Pacific time today (Wednesday, September 9, 2015), or noon central/1 p.m. eastern. Apple will live stream the release event. You can watch it here.