The inner ear is found in all vertebrates, with substantial variations in form and function. The inner ear is innervated by the eighth cranial nerve in all vertebrates.
The thyristor or silicon controlled rectifier, SCR is a device that has a number of unusual characteristics. It has three terminals: Anode, cathode and gate, reflecting thermionic valve / vacuum tube technology.
VCR stands for Video Cassette Recorder. VCRs not only record video on a VHS cassette, they also play back the recording. The VCR is a necessary tool for enjoying VHS tapes of any kind. By 1986, there was a VCR in one-third of American homes.