Final answer:
Forms in a database that do not have a record source are navigation forms, switchboards, and dialog boxes.
Step-by-step explanation:
Forms in a database are used to collect and display data. They typically have a record source which is the table or query that the form is based on. However, there are some types of forms that do not have a record source:
Navigation forms: These are used to help users navigate through a database by providing buttons, tabs, or a tree view. They do not display or collect any data.
Switchboards: These are similar to navigation forms but are specific to Microsoft Access. They also provide a centralized way to navigate through a database but do not have a record source.
Dialog boxes: These are small forms that display messages or prompts to users and do not have a record source.