Digital Living Network Alliance (DLNA; originally named Digital Home Working Group, DHWG) was founded by a group of PC and consumer electronics companies in June 2003 (with Intel in the lead role) to develop and promote a set of interoperability guidelines for sharing digital media among multimedia devices under the auspices of a certification standard. DLNA certified devices include smartphones, tablets, PCs, TV sets and storage servers. The group published its first set of guidelines in June 2004. The guidelines incorporate several existing public standards, including Universal Plug and Play (UPnP) for media management and device discovery and control, and widely used digital media formats and wired and wireless networking standards. DLNA worked with cable, satellite, and telecom service providers to provide link protection on each end of the data transfer. The extra layer of digital rights management (DRM) security allows broadcast operators to communicate digital media to certain devices (e.g., to those of their customers) in such a manner that further, unauthorized, communication of the media is difficult. In March 2014, DLNA publicly released the VidiPath Guidelines, originally called "DLNA CVP-2 Guidelines." VidiPath enables consumers to view subscription TV content on a wide variety of devices including televisions, tablets, phones, Blu-ray players, set top boxes (STBs), personal computers (PCs) and game consoles without any additional intermediate devices from the service provider. By September 2014 over 25,000 different device models had obtained "DLNA Certified" status, indicated by a logo on their packaging and confirming their interoperability with other devices. In June 2015 the organization claimed membership of "more than 200 companies". On January 5, 2017, DLNA announced that "the organization has fulfilled its mission and will dissolve as a non-profit trade association." Its certification program continues to be conducted by SpireSpark International of Portland, Oregon. History Intel established the DLNA along with Sony and Microsoft in June 2003 as the Digital Home Working Group, changing its name 12 months later, when the first set of guidelines for DLNA was published. Home Networked Device Interoperability Guidelines v1.5 was published in March 2006 and expanded in October of the same year; the changes included the addition of two new product categories — printers, and mobile devices — as well as an "increase of DLNA Device Classes from two to twelve" and an increase in supported user scenarios related to the new product categories. Specification The DLNA Certified Device Classes are separated as