Citizens Advice and Citizens Advice Scotland act as umbrella bodies for the bureaux in the UK. They provide access to information, training courses and consultancy services for all bureaux, and regularly audit individual bureaux against the requirements of their respective membership standards. All bureaux try to ensure their services are accessible to all sections of the community, so that provision can be made for the housebound, immigrant communities, rural inhabitants, elderly and disabled as appropriate. Membership of Citizens Advice gives each bureau access to the national information portal, known as AdviserNet and to internet access provided through a Virtual Private Network. Information on clients' problems and the advice offered to them is entered into the "Casebook" national database. Its predecessor system was "Petra" and before that " CASE".