Samsung PL64E8000GFXZP - Manual (Page 178)

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G : General programming, suitable for
all audiences.
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PG : Parental Guidance.
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14+ : Programming contains themes
or content which may not be suitable
for viewers under the age of 14.
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18+ : Adult programming.
N To block certain content, select an
entry field to lock (That is, you “click
it”.). For example, click the 18+ lock
and you block all TV programs rated