ls -lah /usr/lib/cups/
total 75K
drwxr-xr-x  10 root root 256 2007-10-18 10:34 .
drwxr-xr-x 193 root root 75K 2007-10-18 09:54 ..
drwxr-xr-x   2 root root 488 2007-10-18 10:39 backend
drwxr-xr-x   2 root root 264 2007-10-18 10:37 backend-available
drwxr-xr-x   2 root root 192 2007-10-18 10:37 cgi-bin
drwxr-xr-x   2 root root 168 2007-10-18 10:37 daemon
drwxr-xr-x   2 root root 104 2007-10-11 18:39 driver
drwxr-xr-x   2 root root 672 2007-10-18 10:37 filter
drwxr-xr-x   2 root root  96 2007-10-18 10:37 monitor
drwxr-xr-x   2 root root 128 2007-10-18 10:37 notifier
vampas@lgl:~$ ls -lah /usr/lib/cups/backend
total 305K
drwxr-xr-x  2 root root  488 2007-10-18 10:39 .
drwxr-xr-x 10 root root  256 2007-10-18 10:34 ..
-rwxr-xr-x  1 root root 7.1K 2007-07-20 12:51 beh
-rwxr-xr-x  1 root root  37K 2007-10-03 09:55 bluetooth
-rwxr-xr-x  1 root root  16K 2007-10-08 12:38 canon
-rwx------  1 root root  24K 2007-10-04 18:39 cups-pdf
-rwxr-xr-x  1 root root  16K 2007-10-08 12:38 epson
-rwxr-xr-x  1 root root 8.8K 2007-09-19 09:01 hal
-rwxr-xr-x  1 root root 8.2K 2007-10-12 12:02 hp
-rwxr-xr-x  1 root root 7.8K 2007-10-12 12:01 hpfax
-rwx------  3 root root  24K 2007-10-15 12:14 http
-rwx------  3 root root  24K 2007-10-15 12:14 ipp
-rwx------  2 root root  19K 2007-10-15 12:14 lpd
-rwxr-xr-x  2 root root  15K 2007-10-15 12:14 parallel
-rwxr-xr-x  2 root root 6.6K 2007-10-15 12:14 scsi
-rwxr-xr-x  2 root root  15K 2007-10-15 12:14 serial
lrwxrwxrwx  1 root root   17 2007-10-18 10:34 smb -> /usr/bin/smbspool
-rwxr-xr-x  2 root root  25K 2007-10-15 12:14 snmp
-rwxr-xr-x  2 root root  13K 2007-10-15 12:14 socket
-rwxr-xr-x  2 root root  16K 2007-10-15 12:14 usb