The document discusses Batch Operating Systems (BOS), explaining their definition, use, advantages, disadvantages, and examples. It highlights that BOS increases efficiency by executing jobs without manual intervention and outlines benefits such as reduced processor stress and effective handling of repeated tasks. Additionally, it lists examples like payroll systems and bank statements while mentioning challenges such as the need for trained operators and difficulties in debugging.

1. Dilouar Hossain
dilouarbd@gmail.com

2. TOPICS OF DISCUSSION.
 WHAT IS BOS.
 Why BOS are used.
 Advantages And Disadvantages BOS.
 Examples of BOS.
 CONCLUSION.

3. WHAT IS BOS.
 Batch processing. Batch processing is the execution of a
series of programs ("jobs") on a computer without
manual intervention. Jobs are set up so they can be run
to completion without human interaction. All input
parameters are predefined through scripts, command-
line arguments, control files, or job control language.

4. WHAT IS BOS.

5. Why BOS are used.
 As batch systems load less stress on processor and
involve less user interaction so that is why we can use
batch system in current days also. Another advantage of
batch systems is that the large repeated jobs are given to
the system and we don’t have to interact with computer
to tell the system that you have to do that job after
finishing that job. Old batch systems were not
interactive i.e. the user interaction was not involved
when the job is running. Now in modern batch systems
we have interactions also. For example we can set the
timer on the job and when the specific time comes then
computer send message to the processor that time is
over. This helps us to avoid too many errors and makes
us easy to debug.

6. Advantages OF BOS
 Processor consumes good time while processing that
mean it knows which job to process next. In real time
systems we don’t have expectation time of how long
the job is and what is estimated time to complete it.
But in batch systems the processor knows how long
the job is as it is queued.
 Sharing of batch system for multiple users.
 The idle time batch system is very less.
 You can assign specific time for the batch jobs so
when the computer is idle it starts processing the
batch jobs i.e. at night or any free time.
 The batch systems can manage large repeated work
easily.

7. Disadvantages OF BOS
 Computer operators must be trained for using
batch systems.
 It is difficult to debug batch systems.
 Batch systems are sometime costly.
 If some job takes too much time i.e. if error
occurs in job then other jobs will wait for
unknown time.

8. Examples of BOS
 1.Payroll system
 Batch systems are ideal for making payrolls. The
salaries of employees can be printed at the end of
month by the batch systems. So the statements
can be made easy by using batch systems.
 2.Bank statements
 At the end of month the bank makes statements
for each account holder. So these bank statements
can be made easily by batch systems at the end of
month.

9. End.