$^V The revision, version, and subversion of the Perl interpreter, represented as a version object. This variable

$= The current page length (printable lines) of the currently selected output channel. The default is 60. Mnemonic:

$] The revision, version, and subversion of the Perl interpreter, represented as a decimal of the form 5.XXXYYY, where XXX is the version /

${^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

ARGVOUT The special filehandle that points to the currently open output file when doing edit-in-place processing with -i. Useful when

@ARG

$^C The current value of the flag associated with the -c switch. Mainly of use with -MO=... to allow code to alter its behavior

$MATCH

$OLD_PERL_VERSION

$^O The name of the operating system under which this copy of Perl was built, as determined during the configuration process. For examples