Nowadays, information transmission facilities and technologies are in the process of continuous
development. You can hardly imagine contemporary world without PC, plane tables, smartphones. At present almost all
necessary information can be found on internet. People do not use thick books to search for information any longer;
they prefer to read more effective electronic books (e-book reader). People read on internet (free or with fee) any book
they like or use smartphones (other gadgets). Thus, electronic book is going to replace a paper book. Electronic version
is more effective in many considerations. It is lighter and less in volume in comparison with the paper version. Hundred books can be loaded into smartphone. If electronic version of the book exists, it can be easily found and read on
internet. These days, electronic books can be read with help of E-link or SiPix technologies.