In some of ITU's other benchmarks paperwork, the conditions "UHDTV1" and "UHDTV2" are applied as shorthand. In 2007, the Society of Motion Picture and Television Engineers released SMPTE ST 2036-1, which defines parameters for two UHDTV devices called UHDTV1 and UHDTV2. The major two cellular operating devices that Blogger focuses on are Android and iOS. UHDTV1 methods are permitted to use BT.709 colour primaries up to sixty Hz.