quotemeta Regexp quote regular expression magic characters
qw/STRING/ LIST quote a list of words
qx/STRING/ Process backquote quote a string
+qr/PATTERN/ Regexp Compile pattern
rand Math retrieve the next pseudorandom number
read I/O,Binary fixed-length buffered input from a filehandle
readdir I/O get a directory from a directory handle
+readline I/O fetch a record from a file
readlink File determine where a symbolic link is pointing
recv Socket receive a message over a Socket
redo Flow start this loop iteration over again
symlink File create a symbolic link to a file
syscall I/O,Binary execute an arbitrary system call
sysread I/O,Binary fixed-length unbuffered input from a filehandle
+sysseek I/O,Binary position I/O pointer on handle used with sysread and syswrite
system Process run a separate program
syswrite I/O,Binary fixed-length unbuffered output to a filehandle
tell I/O get current seekpointer on a filehandle