Berliner Gramophone formulations remained the standard disc record material until the first vinyl records – initially made only for radio use and other special applications – were introduced in the 1930s. Beginning in 1896, Berliner's gramophones were made by Philadelphia-based machinist Eldridge Johnson, who added a spring motor to drive the previously hand-rotated turntable. Berliner also opened an office in New York City, staffed by Frank Seaman and O. D. LaDow and organized as the National Gramophone Company. Master recordings were made onto zinc plates, which were then electroplated and a negative-image "mother" made from them to stamp discs. A major reversal
Polymer (library) Polymer (library) Polymer is an open-source JavaScript library for building web applications using polymer Web Components. The library is being developed by Google developers and contributors on GitHub. Modern design principles are implemented as a separate project using Google's Material Design design principles. Polymer is used by a number of Google services and websites, including the redesigned YouTube, YouTube Gaming, the redesigned Google Earth, Google I/O websites, Google Play Music, redesign of Google Sites and Allo for web. Other notable users include Netflix, Electronics Arts, ING, Coca-Cola, McDonald's, BBVA, IBM and General Electric. Public development of Polymer began on Nov