the set-top unit ViewStation which integrated a PTZ (pan-tilt-zoom) camera with codec and communication electronics, and connected to a user-supplied video monitor on which it was designed to sit. ViewStation sold at the time for US$6000, and was relatively lightweight compared to competitors. Polycom began the development of its first product in the new category of "Document Conferencing Projector", called ShowStation in 1994. In April 1996, Polycom went public on NASDAQ. In 1997, the company began shipping ShowStation in addition to its growing line of audio products and had total revenues of $47 million. In January 1998, Polycom acquired ViaVideo for $54 million and its video conferencing product, which would be named ViewStation. The compact device provided the functionality of a webcam and included additional onboard processing capabilities to offset the computation limitations of most desktop and laptop computers at the time. As computer processing power increased, Polycom transitioned this hardware-software desktop solution to software-only clients called Polycom PVX, and later the Polycom RealPresence Desktop, or RPD. Other members of the ViewStation product line included models with embedded multipoint capabilities, content sharing capabilities, and support for the emerging H.323 IP network protocol. In February 2001, Polycom entered the multipoint bridging market through its acquisition of Accord Networks, which offered the MGC-100 line. In October 2001, it acquired PictureTel. In 2006, Polycom introduced its first HD (High Definition) video conferencing system. Soon after, it announced the Polycom RealPresence Experience (RPX), a three-screen, three-camera room-within-a-room "immersive" teleconferencing system based on a design by Destiny Conferencing (formerly TeleSuites) which Polycom acquired in January 2007. In February 2007, the firm introduced a new multipoint bridge platform called RMX 2000 designed to support HD and telepresence applications. It also expanded its telepresence and HD video product lines in 2007 with the Polycom Telepresence Experience solutions, and new executive desktop solutions, which further expanded its line of room-based conference rooms. In 2008, Polycom delivered the Polycom Converged Management Application (CMA) a video network and system management application for video networks. Later that year, the firm introduced the Distributed Media Application (DMA) 7000, a network-based application that manages and distributes multipoint video calls within a network. Toward the end of 2008, Polycom also announced its plans to increase performance of its systems from 30 to 60 frames per second at higher resolution – 1080p and 720p. In 2010, the firm introduced the Polycom Open Telepresence Experience (OTX