SAP R3 hotkeys
http://web.mit.edu/SAPR3/docs/webdocs/getstarted/gsBTNS.html
SAP R3 tutorial (by MIT)
http://web.mit.edu/SAPR3/docs/webdocs/getstarted/gs.html
SAP - ERP - SAP Enterprise Modelling - Consultants Handbook.pdf
https://docs.google.com/fileview?id=0BxidBHtzlJP4MDRhOWUzOTAtYzc1OS00MjA3LTk4YjAtNWFjNTFjMGQ4MzU5&hl=zh_TW&authkey=CIz6rukL
