Thank you everyone for your replies, it is very much appreciated.
We'll I'm kind of new in the field of scaffolding. And I encountered this 3 terms:
1. Tubular Scaffolding (I don't have any issues with this one for sure it is Tube and fittings).
2. Modular Scaffolding
3. System Scaffolding...
I already tried sir but I didn't find any clear definition for those three.. that's why tried it here, maybe someone can lend me some reference.. to know the difference..thanks