TMP and TEMP files are temporary and can be safely deleted. They are usually dumped on the hard drive and forgotten about by some programs if they crashed and were meant to delete them.
Image file
System file
Temporary File
system file hgu
backupfile
animation/moviefile
A text file, usually with numbers, letters, and/or simple graphics.
Animation/movie flie
Extensions are the last part of a file name for example a text file is usually called example.txt the .txt at the end is the extension and can be many differant things depending on the program that creats it.
.tc is the file extension for a Borland configuration file, for programs from the Borland Software Corporation.
Usually a .exe file, meaning that file is a program.
The .opt file extension is used by innumerable programs. it is usually an option / configuration file, but is also used for certain document types.