Input devices of a computer are many. some common examples are mouse, keyboard, web cam, etc... But apart from these devices there are devices like OMR , MICR, SMART CARD, Magnetic strip which are also connected to computer for specific functions. These slides will take you through the uses, advantages and mechanism of of input devices.

1. OMR, MICR, MAGNETIC STRIP and
SMART CARD
~FATHIMA LIDIYA~

2. INPUT DEVICES
OMR
MICR
Magnetic Strip
Smart Card

3. Optical Mark Recognition (OMR)
It’s a process of identifying pre-
specified marks on OMR sheet.

4. OMR Sheet: It’s a printed document with
boxes or circles which can be filled with
pen or pencil.
OMR Scanner: It is a device designed to
read the OMR sheets by passing a light
beam through it.
OMR

5. Working of OMR
Marked OMR sheet is passed through the OMR
scanner. The scanner recognizes the filled-in
circles by measuring the amount of light reflected
back when a light beam falls on the OMR sheet.
The intensity of light reflection is different for
marked and unmarked circles. This helps the
scanner to easily identify the data from the OMR
sheet. The data is later sent to the computer
connected to the OMR scanner.

6. OMR SCANNER
OMR SHEET

7. • It is used for checking answer sheets of
objective type exams.
• In the process of institutional research.
• Community surveys or consumer surveys.
Application of OMR technology

8. Advantages and Disadvantages
Advantages
• Faster processing.
• Reliable and accurate output.
• Reduces the cost of input.
Disadvantages
• OMR devices may not identify lightly
shaded marks.

9. Magnetic Ink Character
Recognition(MICR)
It is a character recognition system
that uses special ink and characters
(MICR typeface). It helps to verify the
legitimacy or originality of paper
documents .

10. MICR typeface: It’s a special font which consist
of digits 0 to 9 and special characters.
Magnetic Ink: It is a special ink that contain
magnetized particles of iron oxide.
MICR Reader: It is a device used to scan and
read the information directly into a data-
collection device.
MICR

11. Working of MICR
The MICR typeface printed documents are passed
through the MICR reader. The reader performs
two functions, the magnetization of the ink and
the detection of the characters. The identified
characters are then send to the computer.

12. Mainly used by banking industry to
streamline the processing and
clearance of cheques and other
documents.
Application of MICR technology

13. MICR typeface

14. Magnetic Strip
It’s a strip made up of magnetic
material (composed of iron particles)
on a plastic film that can store data.

15. • It can be seen on the back of
credit/debit cards, gift cards, etc..
• Data is in the form of numbers and
characters.
• Magnetic strip card can be read by a
Magnetic card reader
Magnetic Strip

16. Working of Magnetic Strip Card
Once the Magnetic strip card is swiped through
the magnetic card reader, the electromagnetic
charged particles are read as binary data that is
then decoded into letters and numbers. The
decoded data is then sent to the attached
computer.

17. Magnetic Strip card
Magnetic Card Reader

18. Advantages and Disadvantages
Advantages
• Flexibility and durability
• Reliability: Average of 10 year performance for
both card and reader.
Disadvantages
• Ability of magnetic field to erase the card’s
encryption.

19. SMART CARD
It is a debit card sized
plastic card with a microchip
on it.

20. • On a smart card, the microchip is placed under a
gold contact pad.
• Smart Card Reader: Can read/write data on a
smart card.
Smart Card

21. • Banking industry : Credit/debit card
uses both magnetic strip and micro
chip on them.
• Used as SIM cards for mobile phones.
• Public transportation payment cards.
• Authorization card for pay television.
Applications of Smart Card

22. Smart Card Smart Card Reader

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