For general questions about "SAP JCo" (Java Connector). As JCo versions are not backward compatible, please use one of the version-specific tags instead or in addition.
"SAP JCo" is the short-cut for "SAP Java Connector" which is a Java library used to connect to SAP systems through the saprfc protocol.
Major SAP JCo versions are not backward compatible! Therefore, favor using a version specific tag (e.g. sapjco3) over this tag.