• MS SQL. It is an industrial strength database. It accepts multiple users, stored procedures, triggers, replication... The only big drawback is the price tag.
• MS Access A very popular application. Its abilities are limited, especially when large sets of data are involved and do not have multi-users capabilities. However, depending of your needs this may be just what you want.
• MySQL The most affordable database, actually it is free for non-commercial uses. It allows multiple users, and it is a very robust product, even when running in its non-native Windows. The only drawback is the lack of a real user interface.

We can create a software application that will use whatever of these databases. To access the data, we can create a user interface, that can be web based (you will access using your browser connecting to the internet or intranet), or program based (written, for example, in Visual Basic or Perl).