AS1 (Applicability Statement 1) is a specification for Electronic Data Interchange (EDI) communications between businesses using e-mail protocols. The specification has been largely superseded by Applicability Statement 2 (AS2). Both specifications were created by EDI over the Internet (EDIINT), a working group of the Internet Engineering Task Force (IETF) for developing secure and reliable business communications standards.

AS2 (Applicability Statement 2) is a specification about how to transport data securely and reliably over the Internet. Data can consist of Electronic Data Interchange (EDI) messages but may be of any other message type. AS2 specifies how to connect, deliver, validate and acknowledge data. AS2 creates an envelope for a message which is then sent securely over the Internet. Security is achieved by using digital certificates and encryption.

AS3 (Applicability Statement 3) One of the benefits of AS3 is that it's a "push and pull" technology, as opposed to AS2, which is a push-only technology. AS3 offers both 'push' and 'pull' FTP capabilities, which may widen its adoption rate, compared to AS2, which is a push-only protocol. While AS2 has been widely adopted in the consumer-processed-goods supply chain, some experts say AS3 has benefits that could lead to even wider adoption, particularly among security-conscious companies in the healthcare and financial services industries and by those who already rely heavily on FTP to send and receive transactions.

The underlying Internet transport protocol sets the three EDIINT standards apart from each other.

All Banyan Express, Banyan Gateway, Banyan Hub and Banyan Grid customers have access to AS1, AS2 and AS3 support at no extra cost. Banyan Commerce inherits deep AS1, AS2 and AS3 experience from their stakeholder company Tangentia Consulting who is a major implementer of AS2 solutions from IBM Websphere Partner Gateway and Cleo Lexicom.