Fcntl
File::Basename
File::CheckTree
+File::Compare
File::Copy
File::DosGlob
File::Find
File::Spec
File::Spec::Functions
File::Temp
+File::stat
FileCache
FileHandle
Filter::Simple
Time::HiRes
Time::Local
Time::Piece
+Time::gmtime
+Time::localtime
+Time::tm
UNIVERSAL
User::grent
User::pwent