I have placed here some of the interesting material received from my friends and also a bit of what I have chanced upon the Internet myself. The contents of this section are collected from various sources and the Internet. Copyrights in the material remain that of the author(s). The information is for personal use only, not for trade, hire or sale. If there is a problem with any one of the material please send e-mail to the manager. The material will be removed as soon as practically possible.