nd 200 pounds, few desks offered the necessary real estate. Three years later, several true desktop systems appeared but, with prices at $10,000-15,000, few organizations could afford them. In 1993, more than twenty desktop products entered the market. Most sold for $5,000-8,000 (including a computer), and several were in the $3,000 range. One of the companies that offered a product in 1993 was ShareVision. ShareVision's ShareView product ran on an Apple Macintosh computer and transmitted video, voice, and computer data over ordinary telephone lines or POTS (plain old telephone service) lines. The package, which consisted of a combination video capture board and codec, and a network interface board, also included a color camera, a handset, a headset, and software. Initially, the system sold for $4,499, but the price soon dropped to less than $4,000. ShareView's major contribution was to enhance mere file transfer and image sharing with application sharing. A ShareView user could launch an application and share it with another party even though the second user did not have that application on their system. This feature made ShareVision one of the pioneers in the area of visually assisted collaborative tools. Throughout this book, we will refer to this area as personal conferencing. Many competitors have followed where ShareVision led. In January 1994, almost exactly one year after the introduction of ShareVision, Intel introduced its ProShare family of personal conferencing (desktop) products. One ProShare family member, the Video System 200, allowed conferees to see each other Video Communications: The Whole Picture in a quarter-screen window on a PC monitor while sharing a computer application. Other members of ProShare would forgo the face-to-face altogether, in favor of application sharing and voice communications. Intel owns the term document conferencing, in 1993, it bought the rights to use it from VTEL. Critics of ProShare emphasized that it required the local telephone company to furnish ISDN BRI services