Command may mean:

• An order given by an authority, such as a court order, executive order, or general order
• In organizations, an office or position of authority
  • Command hierarchy
  • Commander-in-Chief
  • Chain of command
  • Command center
  • Command (military formation)
• In telecommunication:
  • Command (computing), in computer programming
  • Instruction, when sent during data transmission
  • Signal (computing), in signal processing
    • Command line interface
    • Command pattern, a design pattern in computer science
  • Command key, a modifier key on Apple Macintosh computer keyboards