NBC, which has refused to rate its programs for content, says it will now do so. “The ratings system was developed in 1997 in response to the V-chip section of the 1996 Telecommunications Act, but NBC refused to run the descriptors — V for violence, S for sexual content, L for vulgar language, D for suggestive dialogue and FV for fantasy violence — because of First Amendment concerns and the fear that the onscreen clutter would confuse viewers.”