This command line appears on the screen while the Doctor is investigating the computer:
//-rpr 0; with%20link
So, rpr is either a Cisco iOS command (not likely) or more likely a CGI "thingy":
Which makes much more sense considering Doctor Who would absolutely use some sort of CGI softare. %20 is the symbol for a 'space' - which one never uses the actual ' ' in proper programming or command so as to avoid the use of quotation marks (") improperly.
Also, the semi-colon in *nix is a way to execute multiple commands in a certain order.
"The Library" stored people on "the largest hard drive ever". So I am guessing this is the command line to store "people", with a specific link in CGI to the "nothing" (0)?
So what is "kz" and why is it redirected to be stored or send to ndataextract1.
Inquiring minds want to know.