This document discusses various types of computer operations including real-time processing, batch processing, multiprogramming, multitasking, transaction processing, interactive processing, timesharing, and multi-access. Real-time processing automatically updates the system when changes occur. Batch processing collects all inputs together and processes them at once without user interaction. Multiprogramming and multitasking allow a computer to run multiple processes simultaneously. Transaction processing handles individual data items as they occur. Interactive and timesharing systems allow multiple users to access the system simultaneously through terminals.

1. 1
Types of Computer Operations
Real time Processing
Batch Processing
Multitasking
Interactive
Multiprogramming
Transaction processing
Multi-access and timesharing

2. 2
Real time processing
 System is automatically updated when a
change is made due to transaction occur.
 The terminals must be connected to the
computers.
 Must be an online system.
 Real-Time systems may be either hard or soft
real-time.

3. 3
Examples
Medical imaging systems
 Industrial control systems
Traffic Lights
Robots
Flight Simulations
ATM

4. 4
Batch Processing
 Collecting all the inputs together and
putting them into computer in one go or
batch.
 Several jobs are kept in main memory at
the same time, and the CPU is multiplexed
among them.
 Processing is carried out from beginning
to end without user interaction.
 Advantage: Computer operator load data
only one operation

5. 5
Examples
Payroll Systems
Tax systems
Production of electricity Bills
National Insurance contributions

6. 6
Single Processor
Multiprocessor:

7. 7
Multiprogramming
 Is defined as the apparent simultaneous
execution of two or more programs.
 When one job needs to wait for I/O, the
processor can switch to the other job

8. 8
Multitasking :
That can execute more than one
processor at the same time.

9. 9
Transaction Processing
 Processing takes place when needed, rather than at set
intervals like batch processing.
 Demand processing is usually performed on individual items
of data.
 Transactions processed as they occur immediate update of
transactions
 Updates available to all users of the system increased
security risk
 Additional costs in terms of physical resources e.g.
Hardware more complex backup
Example:
 A monthly paid employee leaves halfway through the month.

10. 10
Interactive System
User interacts directly with the system to
supply commands.
Data as the application program
undergoes execution and receives the
results of processing.
Direct to way communication

11. 11
Time Sharing processing
Using multiprogramming to handle
multiple interactive jobs
Processor’s time is shared among multiple
users
Multiple users simultaneously access the
system through terminals.
Examples
 Airline booking Systems

12. 12
Multi Access
Give the user the impression that he is the
only one using the system.
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