The TOP file extension is related to Evernote notetaking and archiving software and used for files that contain handwritten notes and sketches file.
CAD file created by TopSolid, a program used for CAD design and PDM (product data management); stores a CAD drawing, which is comprised of one or more parts; includes the 3D geometry of the part models and may include Bill of Materials (BoM) information as well. TOP files can be viewed with Missler's free TopSolid'Viewer CAD viewing software.
Tolerance settings file. These files contain the saved settings from the settings dialog box for the Tolerancing tool. These files can be used, e.g., to define the same tolerance analysis settings for different lens files, or to define the tolerance analysis settings to be used with the TOLR optimization operand.
File extension is used by QuickVerse software for studying Bible.
File extension is used by NetSim. Topology diagram.