Samsung PN51E6500EFXZA - Manual (Page 193)

–
NC-17 : No children under age 17.
–
X : Adults only.
–
NR : Not rated.
To block certain content, select an
entry field to lock (That is, “click it”.).
For example, click the X lock and you
block all X-rated movies.
The rating categories are also grouped
so that clicking one category blocks
all the categories a parent would block
along with it. For example, if you block