use English;                     

$.     $INPUT_LINE_NUMBER        
$,     $OUTPUT_FIELD_SEPARATOR   
$;     $SUBSCRIPT_SEPARATOR      
$_     $ARG                      
$"     $LIST_SEPARATOR           
$+     $LAST_PAREN_MATCH         
$0     $PROGRAM_NAME             
$!     $ERRNO                    
$@     $EVAL_ERROR               
$/     $INPUT_RECORD_SEPARATOR   
$\     $OUTPUT_RECORD_SEPARATOR  
$|     $OUTPUT_AUTOFLUSH         
$&     $MATCH                    
$'     $POSTMATCH                
$`     $PREMATCH                 

@ARGV                            
@F                               
@INC                             

%ENV                             
%SIG