Interactive Video and Data Service - (IVDS, Interactive Video Data Services) - IVDS is (was?) located in part of the VHF television spectrum (218-219 MHz). These wireless communication systems allow two-way interaction via the use of a hand-held device at a fixed location. It's not adequate for full motion video transfer but associated nevertheless with interactive TV. These networks might offer viewer participation in game shows, gambling, distance learning, e-mail and more.