Abbreviation Full Form ABNF Augmented Backus-Naur Form API Application Programming Interface ASC American Standards Committee ASN.1 Abstract Syntax Notation One BER Basic Encoding Rules of ASN.1 BNF Backus-Naur Form CCITT International Telegraph and Telephone Consultative Committee CER Canonical Encoding Rules CMS Cryptographic Message Syntax CRAM Challenge/Response Authentication Mechanism CSP Cryptographic Service Provider DER Distinguished Encoding Rules DES Data Encryption Standard EDI Electronic Data Interchange EDIFACT Electronic Data Interchange for Administration, Commerce and Transport FAQ Frequently Asked Questions FIPS Federal Information Processing Standards FREDI Framework EDI FTP File Transfer Protocol GUID Globally Unique Identifier HTTP Hypertext Transfer Protocol IANA Internet Assigned Numbers Authority IETF Internet Engineering Task Force IIS Microsoft Internet Information Server ISO International Standards Organization (or International Organization for Standardization) ITA2 International Telegraph Alphabet 2 ITU International Telecommunication Union MDN Message Disposition Notification MIME Multipurpose Internet Mail Extensions OID Object Identifier OSI Open Systems Interconnection RAM Random Access Memory RFC Request For Comment SASL Simple Authentication and Security Layer SEF Standard Exchange Format SMTP Simple Mail Transfer Protocol TCP Transmission Control Protocol TTL Time-To-Live UDP User Datagram Protocol UN United Nations URI Uniform Resource Identifier UTC Coordinated Universal Time XER XML Encoding Rules XML Extensible Markup Language