国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 12月26日 21時47分

Get a new mobile device this holiday season? Here's our 1999 Qualcomm prototype smartphone. It shows the influence of a Palm PDA. For our curator of the Electricity Collections, collecting the evolution of smartphone tech is a challenge. The development of mobile phones is an important point in hardware history, a melding of telephones and radio that began in the 1930s.
During World War II Motorola made portable radios for the military, like the U.S. Army Signal Corps Handie-Talkie show in our second image. After the war, Motorola, Bell Labs, GE, and others began producing mobile transceivers for Citizens Band radio and Land Mobile Telephone Service.
The limitations of Land Mobile spurred engineers to design a more efficient switching system for the Advanced Mobile Phone Service—the origin of the cell phone system we use today.

Learn more about how we collect smartphones on our blog: http://s.si.edu/smartphones (Link in profile!) #HistTech #Innovation #Smartphone #MobileTech #HolidayHistory #HistoryHoliday #NewPhone

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