Evolution of SAP systems

Hello! I am a student who is writing a bachelor thesis on the effects of SAP implementation in companies. I would like to analyze the history of SAP and the evolution of these systems. Where can I find information about this? More specifically, I mean R/1, R/2, R/3, mySAP .com, SAP ERP. And the second question... Has mySAP .com evolved and changed its name to the current Business Suite? Are mySAP .com and Business Suite completely different systems?