Participants will be able to perform the following actions with the OCS plug-in software: Zoom in on a location to see more detail. Zoom out to see a larger area. Scroll the map using the mouse. Scroll the map using the scroll bars. Resize the browser window to see more or less of the map. Use various display controls in the legend. Participants will be able use the legend associated with a data plot for basic interpretation of the following: a Mesonet station model plot a Mesonet line contour plot a Mesonet wind vector plot a NIDS reflectivity image a NIDS rainfall accumulation image Participants will be able to recognize and interpret additional information on the legend in the plug-in software (date, time, product label, etc). Participants will be able to understand the relationship and convert between GMT (UTC), CST and CDT. Participants will be able to describe in broad terms the web-based client/server architecture for distributing Mesonet and radar data. Participants will be able to recognize the executable and resource files associated with OCS software and know where they belong on the computer. Participants will be able to distinguish when Mesonet data and NIDS data are viewed through the plug-in software and when the data are presented as static images. Participants will know how to contact the appropriate OCS personnel for assistance in using the software and to report bugs or other problems.