สำนักราชบัณฑิตยสภา

51 เปี่ยมศั กดิ์ เมนะเศวต, สั นทั ด ศิ ริ อนั นต์ไพบูลย์, สมชั ย บวรกิ ตติ วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๔ ต.ค.-ธ.ค. ๒๕๕๕ Abstract Development of Mobile Phone in the Past 20 Years Piamsak Menasveta Fellow of the Academy of Science, The Royal Institute, Thailand Suntud Sirianuntapiboon Professor, Department of Environmental Technology, School of Energy Environment and Materials, King Mongkut’s University of Technology Thonburi Somchai Bovornkitti Fellow of the Academy of Science, The Royal Institute, Thailand Mobile phone a handy electronic appliance that was used for two–way communication. The mobile phone was first introduced to the world market in 1973 by Motorola Company Ltd. It was an analog device with a weight of 1.1 kilograms. Subsequently, the mobile phone was developed and changed to the Global System for Mobile Communications (GSM), resulting in a small size and more applications such as sending message, video and music. In 2009, more than 1.4 million people carried mobile phones and 4.3 million people in the world used mobile phones. In Thailand, more than 38.2 million people used mobile phones and more than 77.3 % of the Bang- kokions used them, and 41.2 % used them for sending messages. There has been news regularly that the use of mobile phone might be hazardous to the health of the user. Keywords: mobile phone, analog, GSM, 3G