monolithic_apps.html

this gives an introduction to microsoft dna.

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Java (Parts 1 and 2) in Slovak</A><BR>
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Introduction to Microsoft DNA
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Monolithic, single-scale applications
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<P>

The era of the monolithic PC applications continued and 
enhanced the rich heritage inherited from the age of 
mainframes. The transformation from mainframes to 
personal computers represented a fundamental shift
that moved computer processing power from the hands 
of the few (mainframe operators) to the hands of the many
(anyone with a desktop box). 

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Along with this transformation came the natural 
exuberance and freedom of being able to create, 
sell and share programming solutions to hitherto 
unknown problems.  Thousands of software packages 
were released for personal computers in the early 
days.  

<P>

However, though these early applications were exciting 
and perhaps more powerful than anything that had come 
before, the lack of any collaborative systems meant that most 
applications were built and designed for <I>single users</I>. 

<P>

There were no real email systems, 
no multi-user databases, and most prominently, 
documents were stored locally, or on floppy disks.

<P>

From an architectural perspective, such applications were 
fairly primitive.  

The reason they were primitive was because they integrated 
all three application layers into one maintenance-heavy, 
hard-to-share, and unscalable executable.  

<P>

Wait a minute!  

<P>

What are the three layers of an application and why would 
you want to separate them?

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