Interesting article and I think it has covered most of the important intrinsic objects which are definitely required every time. I was quite confused while my time of learning about the "include" tag. Now I got that its actually useful if we want to emulate like master pages in ASP.NET. I am actually an ASP.NET fan and I learned JSP just to know other technology. Small suggestion is that please capture good screen-shots at proper resolution to avoid the blurs and stretching.