Added event-driven architectures.

architecture.html

@@ -40,6 +40,7 @@
 			<li><em>Pipe and filter</em>, in which data is passed from component to component, and transformed and filtered along the way. Command lines, compilers, and machine learned programs are examples of pipe and filter architectures.</li>
 			<li><em>Model-view-controller (MVC)</em>, in which data is separated from views of the data and from manipulations of data. Nearly all user interface toolkits use MVC, including popular modern frameworks such as React.</li>
 			<li><em>Peer to peer (P2P), in which components transact data through a distributed standard interface. Examples include Bitcoin, Spotify, and Gnutella.</em>
+			<li><em>Event-driven</em>, in which some components "broadcast" events and others "subscribe" to notifications of these events. Examples include most model-view-controller-based user interface frameworks, which have models broadest change events to views, so they may update themselves to render new model state.</p>
 		</ul>
 		
 		<p>Architectural styles come in all shapes and sizes. Some are smaller design patterns of information sharing (<a href="#beck">Beck et al. 2006</a>), whereas others are ubiquitous but specialized patterns such as the architectures required to support undo and cancel in user interfaces (<a href="#bass">Bass et al. 2004</a>).</p>