Telephones Then and Now - Cynthia Kennedy Henzel - Bog

Describes the evolution of telephones. An introduction explains how telephones are used and when they came to be a part of daily life. The remaining chapters detail eras in the development of telephones up until the present day. Additional features include a table of contents, a fast-facts section, sidebars, an infographic, prompts for critical thinking, a phonetic glossary, an index, information about the author, and sources for further research.