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2D Barcode are important of described below are *Aztec are types of 2d that use square model with unique finder pattern in middle of symbol and contain dark and light square data modules. Application of areas are airline industries, government sectors and transportation. *Data Bar is sale of barcode is used in marketing and providing automatic identification data to gain more visibility and accuracy. * Data bar 128 are six sections are quirt zone, start and stop character, encoded data, check character, quiet zone. *Data Bar Limited are features: only encode numeric data, application identifiers appended in human readable format, and cannot read by omni-directional barcode reader. *Data Bar Stacker are useful in healthcare industry and making those item where space is too narrow. *Data Bar Truncated can scanned by linear hand held or imaging and very useful where the space in constraint and mainly used in healthcare industry. * Data Bar EAN13 are divided two halves in left and right halves, encoding techniques are depend upon digit. *Data Matrix are application of areas in healthcare sector, postal services, automotives industry and mobile marketing, etc. *Maxi Code are different mode to encoded data in purchase order number, invoice number, tracking number, customer reference and indicator of the originating carrier. *PDF (Portable data file)14 is used in inventory management system, automotive industry, transportation sector and identification card, etc. *QR Code are provide to easy scan access of information in android, iPhone and other camera based smart phone in QR reader. *Magnetic ink character recognition (MICR) code is used variety of application such as sales, promotions, credits cards, coupons and air ticket and other. *Reduces space symbology (RSS) Barcode can used in government library, healthcare sectors, business process and document tracking, etc. *RSS barcode used for retail of sales.