Hormonal contraception is highly effective: when taken on the prescribed schedule, users of steroid hormone methods experience pregnancy rates of less than 1% per year. Perfect-use pregnancy rates for most hormonal contraceptives are usually around the 0.3% rate or less.
A programmable logic controller (PLC), or programmable controller is an industrial digital computer which has been ruggedised and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.
programmable logic controller (PLC) A programmable logic controller (PLC) is a modular solid state computer with custom programming. The systems are used in industrial control systems (ICS) for machinery in a wide range of industries, including many of those involved in critical infrastructure. PLCs replaced many antiquated systems such as relays, drum sequencers and cam timers, as well as other controllers.