$OUTPUT_AUTOFLUSH
$& The string matched by the last successful pattern match (not counting any matches hidden within a BLOCK or
$EGID
HANDLE->autoflush( EXPR )
$EVAL_ERROR
$^A The current value of the write() accumulator
$EUID
IO::Handle->format_line_break_characters EXPR
$LAST_SUBMATCH_RESULT
HANDLE->format_lines_per_page(EXPR)
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