S is
How to identify the device.

C is
Physical – read what is written on it;
Spiritual – to pray and wait for revelation;
3. system - run some Everest
4 is LinuxWay - plug into the machine and put Linux on it (can be combined with the second method in the hope that it will be determined)
5. systemless - to pretend that it can be and try to use it in a pretended quality, if it does not work, pretend it again in some other quality.