They're "burned" on PCs

• Audiophile's collection
• 1990s music holders: Abbr
• Some coasters, before being scratched
• Computer book inserts, often
• Common '90s music purchases
• Alternatives to vinyl record albums: Abbr
• Borders orders
• Long-term S&L investments
• Music purchases stored in wallets

Wiktionary Word definitions in Wiktionary
n. (plural of CD English)