ODBC, DAO, RDO etc are implemented as DLLs, in Windows - what is a DLL, what is the eqvt in Unix/Linux?
CORBA: "The (ORB) is the middleware that establishes the client-server relationships between objects. Using an ORB, a client can transparently invoke a method on a server object, which can be on the same machine or across a network. The ORB intercepts the call and is responsible for finding an object that can implement the request, pass it the parameters, invoke its method, and return the results. The client does not have to be aware of where the object is located, its programming language, its operating system, or any other system aspects that are not part of an object's interface. In so doing, the ORB provides interoperability between applications on different machines in heterogeneous distributed environments and seamlessly interconnects multiple object systems." -- http://www.omg.org/
CORBA vs SOAP/WSDL/UDDI [publish-find-bind]?
Microservices [REST/GraphQL (APIs)], Containers, Cloud ('MCC')
Web services characteristics?