Semacode is a private company and also this company s trade name for machine-readable ISO/IEC 16022 Data Matrix symbols which encode internet Uniform Resource Locators (URLs). It is primarily aimed at being used with cellular phones which have built-in cameras. The Data Matrix specification is given by the ISO/IEC 16022 standard. Using Semacode SDK software, a URL can be converted into a type of barcode resembling a crossword puzzle, which is called a tag . Tags can be quickly captured with a mobile phone s camera and decoded to obtain a Web site address. This address can then be accessed via the phone s web browser.