26 Mar
                
                    2007
                
            
            
                26 Mar
                
                '07
                
            
            
            
        
    
                10:18 p.m.
            
        I'm pretty sure I already got schooled on this ;)
Alan Horkan wrote:
That screenshot is a classic example of Multiple Document Interface (MDI). Microsoft Word abandoned this approach in about 2000 (if I recall correctly, possibly earlier) as the concept of a single document per window was/is considered easier for users to grasp.