Databases come in many forms depending upon the amount and the complexity of the data they must store. A database commonly installed on Windows computers is Microsoft Access. If you are new to databases, Access provides an easy-to-use interface that lets you work with database tables. While you can use Access as a data source for most website applications, be aware that Access has a file size limitation of 2 gigabytes (GB), and is limited to 255 concurrent users. For this reason, Access is a reasonable choice for website development and corporate workgroups. However, if you anticipate a large user community accessing the site, plan on using a database designed to support your sites intended user base.