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     <title>Matita - Library</title>
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       Matita can be <a href="library/">browsed on line</a>.
       </p>
 
+      <br/>
+
+      <h1>Large Developments</h1>
+
+      <h2>Freescale<a name="freescale"></a></h2>
+      <p>
+      The <a href="freescale/">scripts</a> present:
+      </p>
+
+      <ul>
+       <li>an executable formalization of the operational semantics of
+           any <a href="http://www.freescale.com">Freescale</a>
+           micro-controller of the <a href="http://www.freescale.com/webapp/sps/site/homepage.jsp?nodeId=0162468449&tid=FSH">HC05/HC08/RS08/HCS08 families</a>
+           </li>
+       <li>a compiler from assembly language (pseudocodes + operands) to
+       machine code</li>
+       <li>several automatic checks for unhandled opcodes, memory accesses,
+       correctness of ALU logic, etc.</li>
+       <li>three examples of assembly programs (string reverse, counting sort
+       and perfect numbers sieve) with sets of data to run them</li>
+      </ul>
+      
+      <p>The execution in the executable formalization has been compared
+         to real world execution using the <a href="http://www.freescale.com/webapp/sps/site/overview.jsp?code=784_LPBBNEWTOOL&fsrch=1">USB SPYDER08</a>
+        in-circuit debugger.
+      </p>
+
+      <p>
+       The code (in <a href="http://caml.inria.fr">OCaml</a>)
+       of an executable <a href="freescale/freescale_ocaml">emulator</a>,
+       automatically generated from the scripts above. On the tests above,
+       it runs at about 29% of the speed of the
+       <a href="http://www.freescale.com/codewarrior">CodeWarrior</a>
+       emulation engine.
+      </p>
+
+      <p>The formalization has been the Undergraduate Thesis of
+         Mr. Cosimo Oliboni. The manuscript (italian only) can be found
+         <a href="http://matita.cs.unibo.it/documentation.shtml#freescale">
+         here</a>.
+      </p>
+
+      <h2>The Formal System &lambda;&delta; (lambda-delta)<a name="lambda-delta"></a></h2>
+      
+      <p>The formal system &lambda;&delta; is a typed &lambda;-calculus that
+         pursues the unification of terms, types, environments and contexts
+	 as the main goal.
+         &lambda;&delta; takes some features from the Automath-related
+	 &lambda;-calculi and some from the pure type systems, but differs
+	 from both in that it does not include the &Pi; construction while it
+	 provides for an abbreviation mechanism at the level of terms.
+      </p>
+
+      <p> The development presents the proofs of some important properties that
+          &lambda;&delta; enjoys. In particular: 
+          <ul> <li> the confluence of reduction </li>
+               <li> the correctness of types </li>
+               <li> the uniqueness of types up to conversion </li>
+               <li> the subject reduction of the type assignment </li>
+               <li> the strong normalization of the typed terms </li>
+               <li> the decidability of type inference problem </li>
+          </ul>
+      </p>
+      
+      <p>
+       See the <a href="http://helm.cs.unibo.it/lambda-delta/">&lambda;&delta; home page</a>
+       for more information.
+      </p>
+
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