Bethpage, N.Y., 06/18/2002 -- Cablevision Systems Corporation (NYSE: CVC) today announced the Interactive Television Developers Program for iO: Interactive OptimumSM, Cablevision's suite of digital television services. This program is aimed at supporting and encouraging third-party development of programming for iO: Interactive Optimum's interactive channels, or "Enhanced TV" channels.

iO's ground-breaking "Enhanced TV" channels have sparked attention from the developer and content communities. Cablevision created the iO Interactive Television Developers Program to support the growth of interactive channels by providing selected Cablevision partners with a consolidated and easy to access resource, containing the company's requirements for interactive products on its advanced platform.

"iO continues to bring a new level of digital functionality to the marketplace, including an innovative line-up of enhanced television channels," said Patrick Donoghue, vice president of Interactive Television at Cablevision. "Strong developers are a critical part of our success, and the iO Interactive Television Developers Program provides a centralized support resource to encourage and further accelerate the development of original content for iO's interactive environment."

Accessible to all current iO interactive television partners and select potential partners via http://itv.cablevision.com, the program includes authoring and usability guidelines, code samples, code guidelines and iO style references. It also allows partners to follow open issues, sign up for instant notification of breaking news on the iO platform, connect with iO support staff, and schedule time in Cablevision's "real-world" lab environment.

About Cablevision
Cablevision Systems Corporation is one of the nation's leading entertainment and telecommunications companies. Its cable television operations serve 3 million households located primarily in the New York metropolitan area. The company's advanced telecommunications offerings include its Lightpath integrated business communications services and its Optimum-branded high-speed Internet service. Cablevision's Rainbow Media Holdings, Inc. subsidiary operates programming businesses including American Movie Classics, Bravo, Fox Sports Net and other national and regional services. Cablevision also owns a controlling interest and operates Madison Square Garden and its sports teams including the Knicks and Rangers. The company operates New York's famed Radio City Music Hall and owns and operates THE WIZ consumer electronics stores and Clearview Cinemas in the New York metropolitan area. Additional information about Cablevision Systems Corporation is available on the Web at www.cablevision.com.

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