.FAS File Extension
File Type 1Compiled Fast-Load AutoLISP File
This file is saved in a binary format, which requires a specific program to read its contents.
Compiled script written in AutoLISP, a variation of the LISP programming language used specifically for the extension of AutoCAD software; often used for creating macros that automate common processes within AutoCAD; can be used for distributing utilities that add new features to the software.
FAS files are commonly compiled using Visual LISP, an IDE that is included with some AutoCAD purchases.
File Type 2FASTA Sequence File
Plain text file saved in the FASTA format, a file format used for storing DNA sequences; used in the process of storing and processing bioinformatics information, such as the genomes of different species.
File Type 3QuickSilver Fast Save Lisp File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
Compiled Lisp (.LSP) file saved in the "Fast Save Lisp Format" by Interleaf or QuickSilver; contains compiled code that can be executed by the program; may be generated by selecting either the DTK→Compile→Buffer or DTK→Lisp→Compile menu commands.
FAS files are also called FASL (Fast Load) files.
NOTE: Broadvision acquired Interleaf in January 2000 and later renamed the InterLeaf software to QuickSilver.