What does SIS stand for?
SIS stands for "Sound-in-Sync"
How to abbreviate "Sound-in-Sync"?
"Sound-in-Sync" can be abbreviated as SIS
What is the meaning of SIS abbreviation?
The meaning of SIS abbreviation is "Sound-in-Sync"
What does SIS mean?
SIS as abbreviation means "Sound-in-Sync"
