The PTPress also publishes eleven periodicals and journals in various fields. Journal of China Institute of Communications, a bimonthly started in 1980, is the journal of China Institute of Communications. Telecommunications Science is a monthly that made its first appearance in 1956. It is an influential periodical which is known for its authenticity, guidance and practicality. Telecommunications Technology, a monthly started in 1954, is the most read magazine in the communications industry in China, with the biggest readership and the largest amount of distribution. The four-year-old weekly Communications World, rich both in content and information, is becoming increasingly influential in the industry. Radio is a well-established magazine. Its accumulated amount of distribution in the past 49 years is well over 300 million. With the number of subscribers once reaching 1.97 million, the monthly now still maintains 100,000 subscribers. The monthly Philately will celebrate its 50th anniversary next year. With 100,000 subscribers, it boasts to be the biggest philately magazine with the largest number of distribution in the world. Other periodicals like Living Guide, Motorcycle, PC Home, High Fidelity and China Internet are also very popular in China.