Adesktop databaseis adatabasesystem that is made to run on a single computer or PC. These simpler solutions for data storage are much more limited and constrained than larger data center or data warehouse systems, where primitivedatabasesoftware is replaced by sophisticated hardware and networking setups.

A contact manager is a web application program that enables users to easily store and find contact information, such as names, addresses, and telephone numbers. They are contact-centric databases that provide a fully integrated approach to tracking all information and communication activities linked to contacts.