What were some of the major communication changes in the early 20th century?

In the early 20th century, major communication changes included the widespread adoption of the telephone, which revolutionized personal and business communication by allowing instant voice interactions over long distances. The development of radio broadcasting in the 1920s transformed Mass Communication, enabling the dissemination of news and entertainment to a broad audience. Additionally, advancements in printing technology, such as offset printing, made newspapers and magazines more accessible, further enhancing public discourse and information sharing. Together, these innovations fostered a more interconnected society and laid the groundwork for modern communication systems.