I was learning from a book. It's an item made of paper, it is of a rectangular shape with multiple pieces of paper of the same shape connected together in such a manner, that one can flip any piece of paper to look at either side of it and to move on to another piece of paper. On this paper there were various letters (similar to letters you would find in any online ad today) and also drawings. These letters and drawings were arranged in such a manner as to allow a person looking at them to sequentially retrieve pieces of information. The information retrieved from such a contraption was in a number of ways similar to what one can retrieve today by loading a page from any Wordpress site (or possibly even a Wiki site). Of-course on paper the hyperlinking could not be implemented in a feasible manner, so instead of clickable links there were textual references to other sources and that was definitely a shortcoming. On the other hand ad banners and kitty porn wasn't sprinkled throughout the pieces of paper (pages) and so it was easier to concentrate on the task of information retrieval.