In last lecture we studied about operating system . In that you understand the work of o.s In this we will study about type of O.S in detail. Batch operating system . In this user don’t have any interaction with computer. User submit different jobs to human operator .for example job1,2,3,4,5. Operated then group similar jobs .and send to o.s .then for cpu to get. Executed. making group and then a batch of a group.