Twin directories of info-systems:

[DIR]  ftp://ftp.uni-leipzig.de/pub/linux/pub/comp/os/linux/sunsite/system/Network/info-systems/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/system/network/info-systems/
[DIR]  ftp://ftp.mao.kiev.ua/pub/software/Linux/system/network/info-systems/
[DIR]  ftp://ftp.gts.chel.su/pub/linux/misc/info-systems/
[DIR]  ftp://ftp.linux.org.uk/pub/linux/Networking/info-systems/
[DIR]  ftp://ftp.demon.nl/disk3/Demon/unix/linux/system/Network/info-systems/
[DIR]  ftp://ftp.uniovi.es/pub/linux/system/network/info-systems/
[DIR]  ftp://ftp.padua.org/pub/linux/Mirrors/sunsite.unc.edu/system/network/info-systems/
[DIR]  ftp://ftp.padua.org/pub/linux/Local/info-systems/
[DIR]  ftp://sunsite.mff.cuni.cz/MIRRORS/metalab.unc.edu/pub/Linux/system/network/info-systems/
[DIR]  ftp://ftp.nvg.ntnu.no/pub/mirrors/metalab.unc.edu/system/network/info-systems/
[DIR]  ftp://ftp.csie.nctu.edu.tw/pub/Unix/info-systems/
[DIR]  ftp://204.152.191.39/metalab/system/network/info-systems/
[DIR]  ftp://ftp.tux.org/sites/metalab.unc.edu/system/network/info-systems/
[DIR]  ftp://ftp.tux.org/sites/ftp.uk.linux.org/Networking/info-systems/
[DIR]  ftp://ftp.kfunigraz.ac.at/edvz/info-systems/
[DIR]  ftp://ftp.funet.fi/pub/Linux/PEOPLE/.Linus.old/net-source/info-systems/
[DIR]  ftp://ftp.uvsq.fr/pub/linux/sunsite/system/network/info-systems/
[DIR]  ftp://ftp.uvsq.fr/pub/linux/networking/sunacm/info-systems/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/sunsite.unc-mirror/system/network/info-systems/
[DIR]  ftp://ftp.xemacs.org/sites/metalab.unc.edu/system/network/info-systems/
[DIR]  ftp://ftp.xemacs.org/sites/ftp.uk.linux.org/Networking/info-systems/
[DIR]  ftp://204.152.191.7/metalab/system/network/info-systems/
[DIR]  ftp://ftp.cuhk.hk/.1/packages/info-systems/
[DIR]  ftp://199.6.1.174/metalab/system/network/info-systems/
[DIR]  ftp://ftp.rz.uni-karlsruhe.de/pub/mirror/ftp.rus.uni-stuttgart.de/pub/mirror/sunsite.unc.edu/pub/Linux/system/network/info-systems/
[DIR]  ftp://130.239.17.6/metalab/system/network/info-systems/
[DIR]  ftp://192.87.102.42/vol/2/metalab/system/network/info-systems/
[DIR]  ftp://192.87.102.43/vol/2/metalab/system/network/info-systems/
[DIR]  ftp://ftp.au.freebsd.org/disks/la2/.p/ibiblio/system/network/info-systems/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/linux/199410/cd1/sunsite/system/Network/info-systems/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/linux/199407/cd1/sunsite/system/Network/aris/NET-2Debugged/info-systems/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/linux/199407/cd1/sunsite/system/Network/info-systems/
[DIR]  ftp://wt t0_Series004_z005_ch01.tif/pub/mirrors/sunsite.unc.edu/pub/Linux/system/network/info-systems/
[DIR]  ftp://ftp.lip6.fr/pub/linux/sunsite/system/network/info-systems/
[DIR]  ftp://ftp.cs.cuhk.hk/pub/back2roots/cds/fred_fish/freshfish_vol09_9504_cd1/useful/comm/tcp/amitcp/src/appl/info-systems/
[DIR]  ftp://geo.igemi.troitsk.ru/pub-win/silver/ftp/ftp.kfunigraz.ac.at/edvz/info-systems/
[DIR]  ftp://mirrors.kernel.org/metalab/system/network/info-systems/
[DIR]  ftp://ftp.uu.net/systems/unix/linux/packages/net/info-systems/
[DIR]  ftp://ftp.gwdg.de/pub/linux/tsx-11/packages/net/info-systems/
[DIR]  ftp://ftp.gwdg.de/pub/linux/metalab/system/network/info-systems/
[DIR]  ftp://ftp.gwdg.de/pub/linux/funet/PEOPLE/.Linus.old/net-source/info-systems/
[DIR]  ftp://ftp.cis.nctu.edu.tw/pub/csie/Software/Unix/info-systems/
[DIR]  ftp://nic.funet.fi/pub/Linux/PEOPLE/.Linus.old/net-source/info-systems/
[DIR]  ftp://ftp.cs.cuhk.hk/pub1/Linux/system/network/info-systems/
[DIR]  ftp://149.20.20.135/metalab/system/network/info-systems/