Though a common distributed control system throughout the paper industry, Insight has also provided applications assistance on legacy Measurex  systems in pharmaceuticals as well. From the earlier MX through the later Vision systems, we realize that retaining, maintaining and supporting legacy systems is a significant service. Considering that most Measurex dcs are over 15 years old and were purchased prior to the Honeywell purchase, Insight considers not only the value of sustaining such systems, but also the importance of system understanding when migrating to a newer dcs.