$OS_ERROR

$^S Current state of the interpreter. $^S State ---------

$FORMAT_LINE_BREAK_CHARACTERS

$/ The input record separator, newline by default. This influences Perl's idea of what a "line" is. Works like awk's RS variable, including

${^WIN32_SLOPPY_STAT} If this variable is set to a true value, then

$a

$^T The time at which the program began running, in seconds since the epoch (beginning of 1970). The values returned by the -M, -A

$^L What formats output as a form feed. The default is \f . You