Good day Nairalander,
Please i want to know how to attach a pdf file to my site so that it will appear for people to view.
e,g like LASU admission list or list of items

If I understand what you mean, then it is like any other anchor tag, as in:
<a href="link to pdf">pdf file name or reference</a>

Note: I like to do 2 additional things with PDFs
1) use target="_blank" as I don't want to take away from the user's experience
2) I like to specify 2 things:
a) that the link they are about to click is a PDF and include the size of the file (good for those who have to pay for their bandwidth)
b) that they might want to download the latest adobe reader (and provide a link to that site)

simply create another folder in your web directory (you can call it anything you like), upload the pdf file to that we bfolder and use the HTML syntax that yawatide has posted above.

Thanks for the info i will work on it