What is the purpose of a Ci slot on a TV?

What Is Ci Card Adapter Samsung ? ci slot tv cards DVB-CI defines an interface between a DVB receiver and a PC-Card module It ci slot Experience TV in high definition with the HD+ CI+ module incl card for 6 months of programs Enjoy a wide selection of channels and brilliant picture

circuitos slot Hi all not sure if this is the right place but best i could find I was wondering if there were any cards that can go in to the CI slot on