$EFFECTIVE_GROUP_ID
${^UTF8CACHE} This variable controls the state of the internal UTF-8 offset caching code. 1 for on (the default), 0 for off, -1 to debug the
$^E Error information specific to the current operating system. At the moment, this differs from $!
$LAST_PAREN_MATCH
$^I The current value of the inplace-edit extension. Use
${^POSTMATCH} This is similar to $' ($POSTMATCH
$^R The result of evaluation of the last successful (?{ code }) regular expression assertion (see
$< The real uid of this process. You can change both the real uid and the effective uid at the same time by using
${^UTF8LOCALE} This variable indicates whether a UTF-8 locale was detected by perl at startup. This information is used by perl when it's in
${^ENCODING} DEPRECATED!!! The object reference to the Encode
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