Touch Pad:
The touch pad is a small, flat surface over which the user moves his finger. The movement of finger moves the cursor on the screen. Touch pad has one or more button near it. The button work like mouse buttons.
MICR:
MICR stands for Magnetic Ink Character/ Card Reader. It is
used to read text printed with magnetized ink. It is used by banks for cheque
processing. Each cheque contains MICR character.
Light Sensor:
Light
sensor is an electronic device used to detect light. There are several types of
light sensors. A photocell or photo resistor is a small light sensor.
OMR:
OMR stands for Optical Mark Reader. These
devices use light beam to read data. The data is converted into digital
signals. An OMR device detects marks such as multiple choice test.
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