Today MCI celebrates the first successful test of the transistor on this day in history 1947. Although the research was initially to improve the telephone service, it was arguably the most important invention in the field of electronics. The team that invented the transistor then went on to win the Nobel Prize in Physics for their work in 1956. If you have any problems with your electronics, just give MCI a call on 01324 611371 to see how we can help you.