Related:

• Double!
• Coffee should be black as hell, strong as death, and sweet as love. -- Turkish Proverb
• Double Bucky (Sung to the tune of "Rubber Duckie") Double bucky, you're the one!
  You make my keyboard lots of fun Double bucky, an additional bit or two...
• Accountants do it with double entry.
• Bookkeepers do it with double entry.
• DCD Drop Cards Double
• DCR Double precision CRash