Application Object RunOn property

Object	RunOn Property
Class	Client, server, Called from (Specify the tier by setting the class RunOn property.)
Class instance method	Client, server, Called from
Class static method	Client, server, Called from
Form	Client
Report	Called from
Table	Called from
Table instance method	Called from
Table kernel method(insert, update…)unless overridden	Called from (You can override the table Called from RunOn property value by using server or client modifiers in the method declaration.)
Job	Client

Objects set to Called from can run from either the client or server, depending on where the object is called from

http://msdn.microsoft.com/EN-US/library/aa634829.aspx