=over =item socket SOCKET,DOMAIN,TYPE,PROTOCOL X<socket> Opens a socket of the specified kind and attaches it to filehandle SOCKET. DOMAIN, TYPE, and PROTOCOL are specified the same as for the sysc...

=over =item shmget KEY,SIZE,FLAGS X<shmget> Calls the System V IPC function shmget. Returns the shared memory segment id, or L<C<undef>|/undef EXPR> on error. See also L<perlipc/"SysV IPC"> and the...

=over =item getpwnam NAME X<getpwnam> X<getgrnam> X<gethostbyname> X<getnetbyname> X<getprotobyname> X<getpwuid> X<getgrgid> X<getservbyname> X<gethostbyaddr> X<getnetbyaddr> X<getprotobynumber> X<...

=over =item $# X<$#> C<$#> was a variable that could be used to format printed numbers. After a deprecation cycle, its magic was removed in Perl v5.10.0 and using it now triggers a warning: C<$# is...

=over =item IO::Handle->output_field_separator( EXPR ) =item $OUTPUT_FIELD_SEPARATOR =item $OFS =item $, X<$,> X<$OFS> X<$OUTPUT_FIELD_SEPARATOR> The output field separator for the print operator. ...

=over =item ${^UNICODE} X<${^UNICODE}> Reflects certain Unicode settings of Perl. See L<perlrun|perlrun/-C [numberE<sol>list]> documentation for the C<-C> switch for more information about the poss...

=over =item ${^RE_DEBUG_FLAGS} X<${^RE_DEBUG_FLAGS}> The current value of the regex debugging flags. Set to 0 for no debug output even when the C<re 'debug'> module is loaded. See L<re> for details...

=over =item @ARGV X<@ARGV> The array C<@ARGV> contains the command-line arguments intended for the script. C<$#ARGV> is generally the number of arguments minus one, because C<$ARGV[0]> is the first...

=over =item ${^WIN32_SLOPPY_STAT} X<${^WIN32_SLOPPY_STAT}> X<sitecustomize> X<sitecustomize.pl> This variable no longer has any function. This variable was added in Perl v5.10.0 and removed in Perl...

=over =item $BASETIME =item $^T X<$^T> X<$BASETIME> The time at which the program began running, in seconds since the epoch (beginning of 1970). The values returned by the B<-M>, B<-A>, and B<-C> f...