$OLD_PERL_VERSION

$" When an array or an array slice is interpolated into a double-quoted string or a similar context such as /

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

$[ This variable stores the index of the first element in an array, and of the first character in a substring. The default is 0, but you could

${^MATCH} This is similar to $& ($MATCH

%ERRNO

$INPUT_LINE_NUMBER

%+ Similar to @+ , the %+ hash allows

${^OPEN} An internal variable used by PerlIO. A string in two parts, separated by a \0 byte

$LIST_SEPARATOR