- Fatal – Replace functions with equivalents which succeed or die
 - Fcntl – various flag constants and helper functions from C's fcntl.h
 - File::Basename – Parse file paths into directory, filename and suffix.
 - File::Compare – Compare files or filehandles
 - File::Copy – Copy files or filehandles
 - File::DosGlob – DOS like globbing and then some
 - 
		File::FcntlLock – File locking with fcntl(2) This text also documents the following sub-packages: 
		
File::FcntlLock::Inline File::FcntlLock::Pure File::FcntlLock::XS - File::Fetch – A generic file fetching mechanism
 - File::Find – Traverse a directory tree.
 - File::Glob – Perl extension for BSD glob routine
 - File::GlobMapper – Extend File Glob to Allow Input and Output Files
 - File::Path – Create or remove directory trees
 - 
		File::Spec – portably perform operations on file names
		
File::Spec::AmigaOS File::Spec::Cygwin File::Spec::Epoc File::Spec::Functions File::Spec::Mac File::Spec::OS2 File::Spec::Unix File::Spec::VMS File::Spec::Win32 - File::Temp – return name and handle of a temporary file safely
 - File::stat – by-name interface to Perl's built-in stat() functions
 - FileCache – keep more files open than the system permits
 - FileHandle – supply object methods for filehandles
 - Filter::Simple – Simplified source filtering
 - Filter::Util::Call – Perl Source Filter Utility Module
 - FindBin – Locate directory of original Perl script