DLNA stands for Digital Living Network Alliance; A consortium promoted by 24 companies worldwide including Sony, Samsung, Google, Intel, DOLBY, DTS and others. Apart from the promoters, there are over 100+ member companies who are registered as contributors.
Many media devices of today are designed for interoperability. This can be important especially in a home environment, when the user requires a seamless and smooth playback between different media devices like smartphones, tablets, TV, music systems, game consoles or home theater systems.