Relatively cheap iTunes offerings

• Albums that are around 25 minutes long: Abbr
• Pre-album collectibles
• Series installments, for short
• Paul's ltrs.
• Short albums: Abbr
• Graphics suffix
• Some iTunes downloads, briefly
• Baker's dozen for the Beatles, for short
• The Weeknd's "My Dear Melancholy," et al

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