Can someone please give a small overview on SAP AS installation phases mentioned here?Thanks!!

1 Create users for SAP systems---{Which all users will get created}

2 Install common system files---{Which common files }

3 Unpack SAP Archives--

4 Install Database clients---{Which all exact clients }

5 Install central instance

6 Start Instance

7 ABAP post installation activities--{Which activities specifically}

8 Check DDIC Password

9 Run ABAP Reports--{Which reports will run in his step}.

Thanks!!