$INPLACE_EDIT
$MATCH
@- $-[0] is the offset of the start of the last successful match
$$ The process number of the Perl running this script. Though you can set this variable, doing so is generally discouraged, although
$b Special package variables when using sort()
${^MATCH} This is similar to $& ($MATCH
$DEBUGGING
$0 Contains the name of the program being executed. On some (but not all) operating systems assigning to
$LIST_SEPARATOR
${^LAST_FH} This read-only variable contains a reference to the last-read filehandle. This is set by
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