Standard Instrument Departures (SID)
A SID originates at the runway departure end and specifies initial heading, climb gradients (e.g., 5% to 4,000 ft) for terrain clearance, and enroute transition waypoints.
Standard Terminal Arrival Routes (STAR)
A STAR channels enroute traffic to terminal airspace and initial approach fixes (IAF). Altitude constraints ('At', 'At or Above', 'At or Below') and speed restrictions must be programmed into the FMS.