Related Clues:

• Vinyl albums
• DJs once spun them
• Early RCA output
• Groundbreaking events
• Unprecedented events concealed by anarchist's riflemen in revolution
• Discs on hi-fis
• Collectible records, for short
• Audiophile’s collection, perhaps
• Thrift shop staples
• Vinyl records, briefly
• CDs’ predecessors
• CDs' precursors
• Predecessors of CDs
• They're longer than EPs
• Record collector's collection