Parents Music Resource Center

The Parents Music Resource Center (PMRC) was an American organization. It was established in 1985. The founders of this organization were Pam Howar, Tipper Gore (the wife of Al Gore), Sally Nevius and Susan Baker.
Their stated goal was increasing parental control over the access of children of music that had violent themes, sexual lyrics, themes of drugs or other substandard behaviors in the lyrics by labeling studio albums under Parental Advisory stickers.
Actions.
As a method for tackling the problem, the PMRC wanted a voluntary move by the RIAA or the music industry. PMRC wanted them to develop a similar rating system to the Motion Picture Association of America. Other recommendations by the PMRC which appeared in an article in the "Washington Post" were: printing warnings and song lyrics on album covers, forcing record stores to put albums having explicit covers under the counters.
Filthy Fifteen.
The PMRC made a list of fifteen songs in music. At that time, they found the songs the most objectionable. These songs are listed under the "Filthy Fifteen" list by the PMRC, with the reasons for which the songs are listed.
The Parental Advisory sticker.
On November 1, 1985, the RIAA agreed to put "Parental Advisory" stickers on certain releases at their own discretion. Many record stores wouldn't sell albums having the label (for example: Walmart). Others limited the sales of such albums to adults.
Musician/singer reaction.
Other musicians or singers, including Eminem, Rage Against the Machine and Megadeth.