"E"

Executable (EXE, DLL, …)

"D"

Document (MS Office word document, MS Office excel sheet)

"A"

Archive (Zip, Rar, Tar, …)

"G"

Graphical format (Jpeg, GIF, TIFF, BM P, …)

"T"

Text

"P"

PDF format

"M"

audio or video format

"Z"

mail messages (MSG, …)

"I"

Disk image

"O"

Other (anything that is not recognize d as one of the above)