An ObjectMethod is a method that must be called relative to a previous constructed object of the class type. For example:

package Telecoms

ClassMethod new()

ObjectMethod phone( $who )

must be called something like this 

my $mobile = new Telecoms();
$mobile->phone( "home" );
or you can pass the object in as a parameter if you need to: 
Telecoms::phone( $mobile, "home" );

Related Topics: ClassMethod, StaticMethod