(1) (
Generation 
2)  The second generation of a product, typically hardware, such as the Android Magic smartphone (see 
Android).
(2) The second generation of IBM's CMOS-based mainframes (Parallel Enterprise Servers).  When introduced in 1995, there was no G2 designation, which was later added to clarify the evolution of the line.  See 
IBM mainframes and 
Parallel Enterprise Server.
(3) The second generation of the RealPlayer media player from RealNetworks.  The product was later renamed 
RealOne.