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.
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.
.jpg is a picture format.
backupfile
animation/moviefile