SIMRAT AMLs can be installed on a workstation with either a PC or UNIX platform. The system must have current licences for ArcInfo Arc, ArcPlot and GRID modules. Minimum hardware specifications are as per ESRI recommendations for ArcInfo Workstation version 7.2 or later. Data storage requirements are: AMLs - 5MB; Source Spatial Layers - 130MB; Temporary Processing - 200MB; In addition, Archive files for each single assessment require an additional 20MB of storage space.