electrically switched network
71Electromagnetism — Electricity · …
72Cessna 150 — Model 150 Role Multipurpose civil aircraft Manufacturer Cessna First flight …
73Ground-level power supply — 300px|thumb|right|A section of APS track showing the neutral sections at the end of the powered segments plus one of the insulating joint boxes whichmechanically and electrically join the APS rail segmentsGround level power supply, also known as… …
74History of sound recording — Methods and media for sound recording are varied and have undergone significant changes between the first time sound was actually recorded for later playback until now. Technology Mechanical recording The first devices for recording sound were… …
75Battery (electricity) — For other uses, see Battery (disambiguation). Various cells and batteries (top left to bottom right): two AA, one D, one handheld ham radio battery, two 9 volt (PP3), two AAA, one C, one …
76Boeing 787 Dreamliner — The first All Nippon Airways Boeing 787 (JA8 …
77Electronic music — For electronic musical instruments, see Electronic musical instrument. For other uses, see Electronic music (disambiguation). See also: List of electronic music genres and List of electronic music festivals Electronic music is music that… …
78Timeline of the telephone — Below is a Timeline of the telephone that covers important dates in the history of the telephone.1844 to 1875*1844 Innocenzo Manzetti first mooted the idea of a “speaking telegraph” (telephone). *1849 Antonio Meucci demonstrates a communicating… …
79Conduit current collection — Abandoned conduit trackage at the Kingsway Tramway Subway in London Conduit current collection is a system of electric current collection used by electric trams, where the power supply is carried in a channel under the roadway, rather than… …
80electronic instrument — ▪ music Introduction any musical instrument that produces or modifies sounds by electric, and usually electronic, means. The electronic element in such music is determined by the composer, and the sounds themselves are made or changed… …
