Our Social World 4th Edition Textbook (.PDF) portable document file format

'Recommended Readings' emphasize the most current - and easily accessible - references for further study. Remaining seven chapters deal with other aspects of mobile communications such as mobility management, security, cellular network planning, and 4G systems. Our Social World 4th Edition Textbook (.PDF) portable document file format - The ninth edition offers 11 new readings and a new chart at the beginning of the text to help instructors and students locate key themes and topics.