Related Clues:

• Organize
• Put into piles
• Genre
• Methodically organize, as clothes
• Put into slots
• Alphabetized list
• Ilk
• Arrange in columns
• Arrange
• Do a postal job
• Do post office work
• Separate into whites and darks, e.g.
• Numerical scale, perhaps
• Alphabetize
• End-of-book list