Interactive Optimum, also known as iO, was the digital cable service offered by Cablevision which launched in September 28 2002.¹⁾ It was originally planned to launch in June of 2002. ²⁾. Optimum phased out the iO brand in the mid-2010s.

• 2001 Archive of iO Features

• 2002 iO User's Guide (Scientific Atlanta Boxes)
• 2002 iO User's Guide (Sony Boxes)
• 2002 iO Quick Reference Guide (Scientific Atlanta Boxes)
• 2002 iO Quick Reference Guide (Sony Boxes)
• 2002 Silver Remote User's Guide
• 2005 iO DVR User's Guide
• 2005 iO DVR Install Guide