JCo 2 API and PACKAGES
JCo 2 API is connection oriented, the application has to deal with opening and closing the RFC connections.
The support of JCo 2.x release is ended in 2013, see SAP Note 549268 - SAP JCo 2.x release and support strategy
|com.sap.mw.jco.*||JCo 2 API and runtime framework|
|com.sap.mw.rfc.*||JRFC Engine and drivers|
|com.sap.mw.idoc.*||JIDocLib 3 API and runtime framework|
|com.sap.mw.jco.jra.*||JRA 1.5 runtime (NW AS Java >= 710)|