%^H The %^H hash provides the same scoping semantic as
$> The effective uid of this process. For example: $<
%ERRNO
${^TAINT} Reflects if taint mode is on or off. 1 for on (the program was run with -T), 0 for off, -1 when only taint warnings are enabled
$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
$INPLACE_EDIT
$MATCH
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