What does SIS stand for?
SIS stands for "Strategic Interplanetary System"
How to abbreviate "Strategic Interplanetary System"?
"Strategic Interplanetary System" can be abbreviated as SIS
What is the meaning of SIS abbreviation?
The meaning of SIS abbreviation is "Strategic Interplanetary System"
What does SIS mean?
SIS as abbreviation means "Strategic Interplanetary System"
