The main international standards organization. ISO works to ensure that chip makers, software developers and smart card companies comply with the same specifications. Standards for the smart card industry include: ISO/IEC 7816-1:1998 Physical Characteristics of IC cards. ISO/IEC 7816-2:1999 Position of Module and Contacts on IC cards. ISO/IEC 7816-3:1997 Exchange protocol with IC cards (i.e., communication between readers and cards). ISO/IEC 7816-4:1995 Command set for microprocessor cards. ISO/IEC 7816-5:1994 Numbering system and registration procedure for application identifiers. ISO/IEC 7816-6:1996 Inter-industry data elements. ISO/IEC 7816-7:1999 Inter-industry commands for Structured Card Query Language (SCQL). ISO/IEC DIS 7816-8 Security related inter-industry commands. ISO/IEC DIS 7816-9 Additional inter-industry commands and security attributes. ISO/IEC DIS 7816-10 Electronic signals and answer to reset for synchronous cards. ISO 14443 Proximity cards (contactless).