1st; .pdf = adobe portable(?) document file, you must have a version of adobes acrobat reader on your comp. to read this sort of file. normally you would download the file and read later, but you can open within ie (or other browser) to read immediately. Acrobat reader is available free at click here
2nd; Aol uses (as far as I know) a proprietry browser and email client, and you must use these to use the isp. Hope this helps.