DISADVANTAGES OF BAR CODE

pricing issues
pricing discrepancies can result if store employees forget to code in discount prices. customer and clerks at the check-out then have to deal wit correcting the situation.

damaged labels
bar code readers cannot read labels that are wrinkled, dirty or smudged.

ADVANTAGES OF BAR CODE

it's easy to see why barcodes are a much more effective and easy method of tracking inventory and pricing product, whether there are a few, a few hundred, or a few thousand, they offer automatic product identification, extremely fast recognition and implementation of data, a very low error rate, are extremely cost effective, and can assist employers with lowering overhead and cutting down on training time and labor. the modern world demands that companies stay ahead of the competition and keep up the pace when it comes to modern technology in business. using barcodes is a very integral piece of the inventory tracking process that offers up countless benefits to both the company and its customers.

CAR PARKING SYSTEM

A car parking system is a mechanical device that multiplies parking capacity inside a parking lot. Parking systems are generally powered by electric motors or hydraulic pumps that move vehicles into a storage position.
There are two types of car parking systems: traditional and automated. In the long term, automated car parking systems are likely to be more cost effective when compared to traditional parking garages. Automatic multi-storey automated car park systems are less expensive per parking slot, since they tend to require less building volume and less ground area than a conventional facility with the same capacity. Both automated car parking systems and automated parking garage systems reduce pollution — cars are not running or circling around while drivers look for parking spaces.

Automated Car Parking System

Automated car parking systems use a similar type of technology to that used for mechanical parcel handling and document retrieval. The driver leaves the car inside an entrance area and technology parks the vehicle at a designated area. Hydraulic or mechanical car lifters raise the vehicle to another level for proper storing. The vehicle can be transported vertically (up or down) and horizontally (left and right) to a vacant parking space until the car is needed again. When the vehicle is needed, the process is reversed and the car lifts transport the vehicle back to the same area where the driver left it. In some cases, a turntable may be used to position the car so that the driver can conveniently drive away without the need to back up.

INTRODUCTION TO BAR CODE

A bar code reader (or bar code scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones. Additionally, nearly all barcode readers contain decoder circuitry analyzing the bar code's image data provided by the sensor and sending the barcode's content to the scanner's output port.

Bar code readers can be differentiated by technology as follows:

• Pen-type readers
• Laser scanners
• CCD readers
• Camera-based readers
• Omni-directional bar code scanner