What is the difference between mpg files mov files and avi files?

nothing, capitalisation doesn't matter in filenames. But there may be a difference in the codec with two different AVI files. Capitalization does matter in the filename name extension. It dictates...

a file when referring to electronic systems can be a programme or sequence event recoding structurea database file is a set of created datasets used for storing information in an information...

Neither are actually files. They are references to directories, the current one and the parent directory, respectively. They can be used in file copy and move operations in place of explicitly...

video files (mpg file extension, MPEG file format). It is the same video file format. You can use booth file extensions.

Emf file is a vector image file. Generic vector graphics format recognized by several image-editing applications; a 32-bit version of the original Windows Metafile Format (.WMF), which only supports...