This page provides information about the various telescope-related widgets, plus general topics such as user catalogs, coordinate systems and rotation types. TUI talks to the telescope via the TCC (Telescope Control Computer). Most of the telescope-related windows are available via the TCC menu of the main Status window. TCC Windows (all are items in the TCC menu except for the Status window): . ... Mirror Status Window . Nudger Window . ... Status Window . Other Information: . ...