Twin directories of intro:

[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004-cd/strona_www_SO/LinuxZadania/dariusz_jablonowski/intro/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/materialy-plytka-SO-2005/strona_www_SO/LinuxZadania/dariusz_jablonowski/intro/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/callahans/intro/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/firesign-theatre/intro/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/tlk/intro/
[DIR]  ftp://ftp.eenet.ee/arhiiv/apache/perl/mod_perl-2.0.2/docs/user/intro/
[DIR]  ftp://ftp.eenet.ee/arhiiv/apache/perl/mod_perl-2.0.3/docs/user/intro/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/docs/LuCaS/Presentaciones/200102linuxcol/linux-acis/linux-acis/html/intro/
[DIR]  ftp://ftp.fi.upm.es/pub/mirror/apache/perl/mod_perl-1.99_09/docs/user/intro/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/centos/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/centos/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/Linux/Docs/LuCaS/Presentaciones/200102linuxcol/linux-acis/linux-acis/html/intro/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.linux.ncsu.edu/mirror/mirror.centos.org/3.9/docs/html/rh-cs-en-3/figs/intro/
[DIR]  ftp://ftp.fh-biberach.de/bauakademie/MBA/MBA8Jg_studienfuehrer/daten/intro/
[DIR]  ftp://van.cdl.bmstu.ru/pub/webmastering/doc/web/html40/eng/intro/
[DIR]  ftp://ftp.fh-biberach.de/bauakademie/MBA/Studienfuehrer_8.Jhg/daten/intro/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/3.9/docs/html/rh-cs-en-3/figs/intro/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.wicks.co.nz/pub/linux/dist/centos/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/centos/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/centos/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.etext.org/pub/Politics/Spunk/library/intro/
[DIR]  ftp://ftp.beos.hu/pub/beos/development/samples/preview/intro/
[DIR]  ftp://ftp.beos.hu/pub/beos/development/samples/r3/intro/
[DIR]  ftp://ftp.beos.hu/pub/beos/development/samples/r4/intro/
[DIR]  ftp://ftp.beos.hu/pub/beos/development/samples/intro/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/non-gnu/rascal/uk/intro/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/non-gnu/ampu/doc/intro/
[DIR]  ftp://ftp.amsat.org/amsat/articles/intro/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/centos/3.9/docs/html/rh-cs-en-3/figs/intro/
[DIR]  ftp://ftp.wustl.edu/pub/aminet/demo/intro/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/usr.sbin/sendmail/doc/intro/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/contrib/sendmail/doc/intro/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/src/share/examples/pud/intro/
[DIR]  ftp://ftp.mcs.vuw.ac.nz/_mnt/archive/comp/sources/reviewed/volume02/intro/
[DIR]  ftp://ftp.ai.kyutech.ac.jp/.disk2/CentOS/4.6/docs/html/rh-cs-en-4/figs/intro/
[DIR]  ftp://ftp.ai.kyutech.ac.jp/.disk2/CentOS/4.6/docs/html/rhd-dg-en-4/figs/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/eclipse/plugins/org.eclipse.cdt.doc.user_5.0.0.200806171202/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/eclipse/plugins/org.eclipse.cdt.doc.user/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/eclipse/plugins/org.eclipse.cdt/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/eclipse/plugins/org.eclipse.cdt_5.0.0.200806171202/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/testing/N200904221802/testing/eclipse/plugins/org.eclipse.platform_3.3/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/eclipse/plugins/org.eclipse.platform/intro/
[DIR]  ftp://ftp.inescn.pt/pub/util/.+eclipse/technology/linuxtools/N200904221802/testing/target/eclipse/dropins/cdt/eclipse/plugins/org.eclipse.cdt_5.0/intro/