Which of these was made by Applied Technology, MicroBee or Timex Sinclair?
MicroBee MicroBee (Micro Bee) was a series of home computers by Applied Technology, later known as MicroBee Systems.
555 timer IC The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation, and oscillator applications. The 555 can be used to provide time delays, as an oscillator, and as a flip-flop element. Derivatives provide two (556) or four (558) timing circuits in one package.