Thanks for your comment, Mariusz. The LSF page ypu provided promises even more information from the LSF DRMS: OperatingSystemName OperatingSystemVersion CPUArchitectureName IndividualCPUSpeed IndividualNetworkBandwidth This fits seamlessly to our OS / CPU architecture proposal - good. The question remains if we want to add network bandwidth, available tmp space and / or the number of local disks to the DRMAA model. Beside the cross-check with other DRM's (PBS, SGE, Globus, ...), my initial list of OS identification issues is also still there: - Do we need to distinguish the different BSD derivations ? - Do we really need support for Non-NT Windows and OSF/1 ? - Is SCO OpenServer something different from SCO UnixWare ? Is this a relevant separation ? - Do we need to add mainframe operating systems ? - Do we need a more fine-grained distinguishing between different Sparc processors ? Best, Peter.