1, Batch: input data is prepared and given in sequence
Online: data entered not needed in sequence
2, B: processing sequence is predictable and hence restarting the process in case of failure is easy
O: unpredictable, special recovery/restart proc is required in case of failure
3, B: programs & files cannot be shared
O: can be shared
4, B: programs are scheduled through jobs
O: transation can be run at any time
