General sap r/3 query

hi
    now v say SAP z a r/3 i.e three tier architecture but most of them use 1 tier i.e all the three servers put 2gether in 2 one system z 1 tier. if so it z SAP r/1 rgt...then y do v call SAP R/3 as a three tier architecture...

Hi Kota,
SAP R/3:
Suit of applications written in ABAP to handle data processing.
R = Release
3 = Three tier Architecture
SAP R/3 follows 3 Tier Architecture ,Because it has 3 layers:
1)Presentation server = For User Interaction
2)Application Server = Input /Output management
3)DataBase sever = Handles Database operations
These three server can be differen systems or in the same System but still its R/3.
Dont forget to reward the points if its helpful.
Regards,
Ramganesan K.

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