The diagram below is from 1978. What's remarkable about it is that, at a base level, it describes an information systems architecture that is commonly seen in enterprises in the year 2025:
Starting with the top layer (DBMS or Database Management System) - in modern enterprises we have a corresponding data layer (AWS RDS, MS SQL Server, Oracle DB, etc).
Next, the diagram has an "External Schema Interface" - in modern enterprises, this schema interface is typically called a "database view" or "virtual table".
Below that we have the "Application Program Interface" layer, which corresponds with the API Gateway of modern enterprises (Apigee, Mulesoft, Kong, etc).
Then we see the "Query Interface" and "Report Generator Interface", which is now represented by the Controller layer of an application, and is used to consume and transform the data into a user interface.
View the report the diagram above came from at https://babel.hathitrust.org/cgi/pt?id=mdp.39015077587742&seq=54