Spacecraft Parts

Command and data handling: Odyssey's computing functions
Telecommunications: Communications capability between Earth & Mars
Electrical Power: Generation of power
Guidance, navigation, and control: Sensors for controlling the spacecraft
Propulsion: Thrusters and main engine
Structures: The two spacecraft modules
Thermal Control: Temperature controls
Mechanisms: Operating high-gain antenna and deploying GRS boom
Flight Software: Receiving commands
Instruments: Conducting science investigations