QR coding allows information to be packed onto a small area that can be read by a code reader.
Code readers apps are free and can easily be downloaded from the Google Play Store or internet onto a cell phone or tablet making them portable and convenient.
Scan Life  ScanLife Barcode & QR Reader are among many  popular code readers available.

A QR code can be embedded in your business cards.
Any information including your entire website can be accessed from your business cards.

QR codes can be used to

• access websites
• view instruction manuals
• watch videos
• access technical data
• check inventory records
• … and much more