Notes about the FAS file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The FAS file type is primarily associated with 'FASTA Format'. FASTA is a DNA and Protein sequence alignment software package first described (as FASTP) by David J. Lipman and William R. Pearson in 1985 in the article Rapid and sensitive protein similarity searches. The original FASTP program was designed for protein sequence similarity searching. FASTA format files often have file extensions like .fa, .mpfa, .fna, .fsa, .fas or .fasta.
Detailed information for file extension FAS:
Hex: 3E , ASCII:
Other applications associated with file type FAS:
- 3D Fassade Plus (Basic Module)
- AutoCAD (Fast-load Auto LISP) by Autodesk, Inc. The identifying characters used for this association are - Hex: 0D 0A 20 46 41 53 34 2D 46 49 4C 45 20 3B 20 44 6F 20 6E 6F 74 20 63 68 61 6E 67 65 20 69 74 21 0D 0A , ASCII: FAS4-FILE ; Do not change it! Program ID: AutoCADAutoLISPFastLoadFile , AutoCADLTAutoLISPFastLoadFile
- Common-Lisp (Pre-compiled File)Typically lower case on *nix systems.
- Macsyma Compiled Program
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.