Possible Clues:

• LPs and CDs: Abbr.
• Hi-fi spinners: Abbr
• Upvotes
• LPs, CDs, etc. (Abbr.)
• Teacher ___ (college application requirements that can be awkward to ask for)
• 45s and 78s (abbr.)
• LP's and CD's: Abbr.
• Letters with college apps
• CDs and LPs: Abbr
• Letters teachers send to colleges, informally