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

@ARG

$EFFECTIVE_USER_ID

$0 Contains the name of the program being executed. On some (but not all) operating systems assigning to

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

$b Special package variables when using sort()

$INPUT_LINE_NUMBER

$FORMAT_TOP_NAME

%SIG The hash %SIG contains signal handlers for signals. For example:

$WARNING