[erlang-questions] "group" and "user" mnesia tables; are they used for something in OTP?

[Paulo Sérgio Almeida]

Hi all,

when using mnesia tables with names "group" and "user" they don't show 
up in table viewer (tv), unless I ask it to show "System Tables". This 
makes me afraid of using these table names, wondering what else they are 
used for, somewhere.

Does someone know if that is the case and they should be avoided by 
normal apps or can I use these names with no problem?

Regards,
Paulo