Guess my luck ran out when I tried searching.
For some reason I keep on getting Yu Gi Oh! cards sets when I search for RDS (Something like Yu Gi Oh Rise of Destiny)
Not sure if that's what your friend meant.
RDS also stands for the following (from wikipedia)
# Radio Data System
# Random Dot Stereogram
# Respiratory distress syndrome
# Romanian Data Systems
# Royal Dublin Society
# Le Réseau des sports (rds) Inc., a French-language cable TV sports network in Quebec and Canada, owned by Bell
Globemedia
Yeah, totally unrelated, but might be of some interest >.>