Perl extensions are packages which provide both XS and Perl code
to add new functionality to perl. (XS is a meta-language which
simplifies writing C code which interacts with Perl, see
-L<perlapi> for more details.) The Perl code for an
+L<perlxs> for more details.) The Perl code for an
extension is treated like any other library module - it's
made available in your script through the appropriate
C<use> or C<require> statement, and usually defines a Perl
In most cases, C<kill> kill is implemented via the CRTL's C<kill()>
function, so it will behave according to that function's
documentation. If you send a SIGKILL, however, the $DELPRC system
-service is is called directly. This insures that the target
+service is called directly. This insures that the target
process is actually deleted, if at all possible. (The CRTL's C<kill()>
function is presently implemented via $FORCEX, which is ignored by
supervisor-mode images like DCL.)