LASI (Layout System for Individuals) was a free Windows tool used to view and edit design files. The LASI tool no longer exists: development has been discontinued and the home page is gone. It used its own file format of which there are two variants. Files with the ending.tlc can store only a single cell whereas.tld files can contain a whole design. The data can be stored in physical values and in relative values. If the data is stored in relative values, it is converted to physical units via the lambda value. The LayoutEditor can import both of these formats and will continue to support LASI import permanently. An export is not supported and no longer makes sense because the LASI software is no longer available.