DOS is a command line OS, single user, much less powerful than Linux or Unix. Many commands for DOS were also present in (and copied from?) CP/M. Many Linux/Unix commands are different from those of DOS.
Linux is modeled on Unix, but developed independently, and is free, open sourced software. Unix, in its many flavors is propriatery, although I think Sun might have open sourced their version of Unix, but I could be very wrong.
BPEL is an XML-based grammar for describing the logic to coordinate and control web services in a business process. The roots of BPEL began in December of 2000, when Microsoft published XLANG. This was followed in March of 2001 when IBM published the Web Services Flow Language or WSFL.
BPEL itself was first released in July of 2002, as BPEL 1.0. BPEL 1.0 merged the flat-graph process definition approach and the structural constructs approach of the previous langauges into BPEL 1.0. In May of 2003, BPEL v1.1 was released with a set of revisions, and that was the version of the specification that was submitted to the OASIS organization.
OASIS standardized the language in April of 2007 and it is now known as formally as WS-BPEL 2.0.
JOLAP was not correctly implemented by any vendors and has been quietly forgotten. Even though Oracle now owns both the Oracle OLAP Option (which has a proprietary Java OLAP API) and Essbase (which also has a proprietary Java OLAP API), we do not expect JOLAP to be resurrected.
I would also like to recommend a book on OLAP.The book is available on Amazon & you can buy an e-book directly from the publisher by writing OLAPWorldPress@gmail.com.