At the beginning of time, books were something very few people could afford. Most books were written by hand, typically by monks or priests. A good portion of these books were bibles. Most people who owned them had to pay quite a price. Today, reading and owning a book is something that can be done without paying a dime. The invention of the printing press led to uniform text and mass quantities of published materials. Who could have known that the process of writing a book could be simplified into an at home project that thousands of people do on a daily basis?
The personal printer allows for someone to print any text or graphics so long as the user has put an ink cartridge in the printer. The printer hooks up to a computer and takes the image of the document and translates it into an electrical pattern that corresponds with the printer. Printers have gotten so advanced that you can send the image wirelessly through a network, or simply scan a preexisting document and have a exact copy made. There are printers designed to handle thousands of pages of content, and home printers designed for a smaller and more personal scale.
Printers are such a popular item that there are people who actually make their own. Some people form printers out of legos, ball point pens, and an electronic signal. Just that simply makes a unique way of duplicating data. Printers have the ability to create a document that is so detailed it would have taken months if not years for one of the few who designed bibles and other books by hand in the intricate way that was customary for the time period. Books today that are so easy to print out that even children are able to do so with some parental supervision.