Access Session Management

A non-transitory computer readable storage medium on which is stored machine readable instructions that when executed by a processor cause the processor to:

• create trunk status data for each user account;
• in response to detecting a plurality of concurrent access sessions relating to a single user account, create respective branch status data for each access session;
• update the branch status data in accordance with user access operations;
• and
• when an access session relating to a user account ends, update the trunk status data for said user account based on a comparison of the branch status data of the access session which has ended with the trunk status data for said user account.