A Manager is normally used to enter and or maintain master data records like customers, contacts and inventory items. Examples include the Customer Manager, the Catalog Manager and the Vendor Manager. Managers are normally written using an object called a view. Views are also used when creating other types of programs. A View can be used to create both form based programs like managers, and list based programs such as lookup or inquiry programs. A view is a program that can be executed independently of other programs (you can switch between views when you have two open in the application).
A Manager is basically a data entry form that can be divided into or contain various components such as Tab Pages, Lists, Radio Buttons, and Check boxes. In many cases, a Manager program will support field level security, and the defaulting of data into new records to speed data entry.