Ang aming pelikula at video library ay maaari lamang mai-stream o mai-download ng mga miyembro lamang
Magpatuloy na panoorin nang LIBRE ➞Tumatagal ng mas kaunti sa 1 minuto upang Mag-sign Up pagkatapos ay masisiyahan ka sa Walang limitasyong mga pamagat ng Pelikula at TV.
Switchboards, Old and New 1932 Libreng Walang limitasyong Pag-access
Traces the development of voice switching methods from the first system that utilized the wires of a burglar alarm unit in Boston in 1877, to the "latest type" of switching in central offices, circa 1932. Along the way, we get the evolution of the Operator as well. Originally teenage boys were hired as operators, but it was quickly noted that they were not ideal due to being rambunctious and prone to pranks. Emma and her sister Stella Nutt were the first female operators, hired in 1878. They started a tradition that continued to the 1970s, when equal hiring practices made it possible for men to become operators as well, again.
Runtime: 11 minuto
Kalidad: HD
Pakawalan: Nov 13, 1932
Bansa: United States of America
Wika:
