The Berlin Pneumatic Post, an engineering feat, became the world's second-largest after Paris. By 1939, it had 90 offices linked by 12 lines over 400 kilometers, handling eight million items yearly. It used underground tubes to send pressurized capsules with letters. However, its decline was hastened by emerging telephone networks and electronic communication, which offered faster and more versatile means of information exchange. This shift rendered the pneumatic system obsolete, marking an end to this unique chapter in communication history.

The early days of cinema, known as the silent film era, were not entirely silent as piano music often accompanied the screenings. The first film to include music was presented by the Lumière brothers in France in 1895. Initially, music was used to drown out background noise such as the projector's mechanical whirring and clicking, but it gradually became recognized as a tool for dramatic enhancement in filmmaking.