The S stands for Siri, she is the intelligence assistant created to help iPhone users.
It means Iphone 4 (For) S (Steve). They postponed iphone 5 and let out an immediate new iphone called Iphone4S due to Steve's days coming to an end.
iphone 3g s
The IPhone 4's from Verizon are the same as the IPhone 4's from AT&T. The only difference is the service.
iPhone 3GS
iPhone 3G S = iPhone 3G + Extra's
if you mean iphone, yes, it was out on the 14th of march
Do you mean remove them? and if so, you need to reset the iPhone.
if you mean developement as in generations of iphones, then: 2008---- iphone 2g 2009---- iphone 3g 2009---- iphone 3gs 2010---- iphone 4 and if you mean application development (well paid job) then look it up on youtube...
Selena Gomez Has The iPhone 3G [s] =]
The iPhone 5 has already come out.
iPhone 6s plus
Both the iPhone 3G and the iPhone 3G S support MMS with the 3.0 update.