Twin directories of SLS:

[DIR]  ftp://ftp.nsysu.edu.tw/Linux/OpenLinux/SLS/
[DIR]  ftp://ftp.zenez.com/pub/SCO/SLS/
[DIR]  ftp://129.102.1.25/pub/SLS/
[DIR]  ftp://82.215.30.181/pub/linux/historic/SLS/
[DIR]  ftp://192.136.111.34/pub/sco-ports/sosco/SLS/
[DIR]  ftp://192.136.111.36/pub/sco-ports/sosco/SLS/
[DIR]  ftp://ftp.celestial.com/pub/sco-ports/sosco/SLS/
[DIR]  ftp://ftp.uni-leipzig.de/pub/linux/pub/comp/os/linux/SLS/