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Venous circulation system of the hand
Venous circulation system of the foot
Blue-style Mac operating system
A system unit for a PC with a beautiful design
Windows operating system logo on a black background
Ubuntu icon from the Ubuntu operating system
Collision of robots. Cyborgs against the system
System shock 2 face
A drawn space system with planets
The solar system through the eyes of space
The surface of one of the planets in the solar system
An unpopulated green planet in the solar system