For scanned magazines CBR (comic book reader) is far more handy to use then PDF. You will find great free comic book readers just about anywhere, for any system. I regulary read old computer magazines in my mobile using the android comic book reader. Else i regulary read both computer magazines and comics using Cdisplay for Windows.
This little handy app automatically converts any scanned PDF magazine to CBR format instead. CBR is simply regular JPG pictures (of each page in the magazine) put in a standard zip archive renamed to .cbr
But remember, this app just works for scanned magazines so don't try to convert non scanned PDF magazines.
You will find plenty of advantages using CBR instead of PDF. You can even put together your own favourite ST Format Magazine by picking your favourite reviews from lots of different issues of ST Format and then put your favourite pages in a standard zip file and rename it to .cbr (i did)
This (windows) app is PD and the source code is in there too.
http://s000.tinyupload.com/index.php?fi ... 7320428423