Communications is a major category of books published by the PTPress. These books have played a significant catalytic and irreplaceable role in the development of communications industry in China. The best-sellers include: a series on communications engineering, an 18-volume handbook on telecommunications engineering design, an encyclopedia about posts and telecommunications in China and a number of English-Chinese telecommunications dictionaries. These books and dictionaries, which are compiled by renowned and influential specialists and scholars in the field, cater to the needs of communications engineers, managerial staff as well as professors and students in communications colleges and universities. This explains why the PTPress has a high profile and enjoys a leading position in the field of communications ever since its founding some 50 years ago.