flv
Depending on what kind of application you are creating, any saved Flash file itself has the FLA extension. The final produced output is either a SWF or a Projector EXE.
Image file
System file
Temporary File
The file extension is the three letter file type designation following a period at the end of a file name. It determines what type of file that file will be treated as. Changing a text (.txt) document to .wmv will make the computer treat it as a Windows Media Video file and thus it will be opened with your default program for viewing .wmv format videos.
The extension. It tells Windows what kind of a file it is. For example, a file with the ".doc" extension is a Microsoft Word Document.
system file hgu
XLS is the shorthand for Microsoft Excel file extension. A file extension is the group of letters following a period in a file name, denoting what kind of file it is.
.jpg is a picture format.
No. Macromedia Flash 8.0 can't open and edit Photoshop files (that is, files with extension ".psd"). But it can import that kind of files. The result is a "flattened" bitmap object in the stage (File>Import>Import to Stage...) or in the library (File>Import>Import to Library...). However, in most cases is preferable convert the Photoshop file in a JPG image file before import it in Flash.
backupfile
animation/moviefile