41. Strand displacement complexes can be used to make molecular logic gates capable of complex computation. 42. We even have an article with the title " Inverter ( logic gate ) ". 43. Logic gates can also be used to store data.44. Logic gates can be made from non-linear optical effects.45. The principles of magnetic amplifiers were applied non linearly to create magnetic digital logic gates . 46. An inverter circuit serves as the basic logic gate to swap between those two voltage levels. 47. A differential amplifier is used as the input stage emitter coupled logic gates and as switch. 48. The classical way to represent a digital circuit is with an equivalent set of logic gates . 49. Quantum logic gates are represented by unitary matrices. 50. Digital machines often have millions of logic gates .