Download or read book The Invisible Weapon written by Daniel R. Headrick and published by Oxford University Press, USA. This book was released on 1991 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines the political history of telecommunications between 1851, the year the first telegraph cable linked France and Britain, and the end of World War II. The author attempts to illustrate the political aspects of information technology, such as radio propaganda and cryptography.