use my answer below and make it concise: Describe HL7 by identifying the mission, defining the "7", and purpose of the HL7. HL7, stands for Health Level Seven International, is an organization that is focused on developing the standards to facilitate the exchange of electronic health information. Their mission is to create the standards used in the exchange, integration, sharing, and retrieval of electronic health information that supports clinical practice and the delivery of care. The "7" is the Application Layer: this enables the user applications to interact and exchange information, this is where HL7 operates making health information usable from platform to platform. This is the highest level of the OSI model and is primarily responsible for interpreting data for end users, ensuring interoperability between systems, such as EHRs, lab systems, radiology systems, and billing