In this scenario, a user would require access to update information from files in the home directories on a server or customer records from a database.
This type of access and work load generated by such users is different from the traditional workloads seen in client–server systems of today.
[citation needed] Mobile databases are not used solely for the revision of company contacts and calendars, but are also utilized in a number of industries.
This is in database theory known as "replication", and good mobile database system should provide tools for automatic replication that takes into account that others may have modified the same data as you while you were away, and not just the last update is kept, but also supports "merge" of variants.
Commercially available mobile databases include those shown on this comparison chart.