Telephones and mobiles

the long version

From early forms of communication, such as the telegraph, and morse code to today's super-fast communications through the internet, trace the evolution of technology's developments in all things telephone-related. A host of communication devices and telephones technologies, such as how wires are used and why vibrations are important, to wireless mobile phones and sending digital images and sounds via smartphones, show how inventors and engineers have developed and improved on technology to make telephones such an important part of human history. This book also dissects some of the major developments in each era, to give a rounded picture of these amazing machines. Technology Timelines is a series of six book aimed at upper KS2 and early KS3 readers, tracing the development of specific technologies through the ages.