app1.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>     
<html>
<body>
<c:set var="thevalue" scope="application"  value="Everyone can see this" /> 
<center>
   <h1><c:out value="${thevalue}"></c:out>.</h1>
</center>
</body>
</html>

app2.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>     
<html>
<body>
<center>
   <h1><c:out value="${thevalue}"></c:out> here as well.</h1>
</center>
</body>
</html>
app1.jsp      app2.jsp      app2.jsp in "siegel"