The Concepts sections provides information on:

• Overview
• Barcode Specifications
• Checksums
• Boundary and Point Properties
• Code39StartStopPatternsAreMandatory
• Barcode Types
• Add 2 and Add 5 Barcode Specifications
• Australian Post 4-State Barcode
• Aztec
• BCD Matrix
• Codabar
• Code 32
• Code 39
• Code 39 Extended
• Code 93
• Code 93 Extended
• Code 128 and EAN 128
• DataLogic 2 of 5
• Data Matrix
• EAN-8
• EAN-13 and JAN
• GS1 DataBar
• IATA 2 of 5
• Industry 2 of 5 (Industrial 2 of 5)
• Intelligent Mail
• Interleaved 2 of 5
• Inverted 2 of 5
• Matrix 2 of 5
• MicroPDF417
• Patch Code
• PDF417
• PLANET
• PostNet
• QR Code
• Royal Post 4-State Barcode
• UPC-A
• UPC-E
• UPU S18 4-State Barcode
• Glossary