The core of the Holos Server was a business intelligence (BI) virtual machine.
[1] The Holos Language was a very broad language in that it covered a wide range of statements and concepts, including the reporting system, business rules, OLAP data, SQL data (using the Embedded SQL syntax within the hosting HL), device properties, analysis, forecasting, and data mining.
Holos Server provided an array of different, but compatible, storage mechanisms for its multi-cube architecture: memory, disk, SQL.
Before its demise, the Holos Server product ran under Windows NT (Intel and Alpha), VMS (VAX and Alpha), plus about 10 flavors of UNIX, and accessed over half-a-dozen different SQL databases.
Following the takeover, support for Holos was outsourced to Raspberry Software, which was set up by former employees of Crystal Decisions.