Difference between MLP and ANN

I hope you are well, I will start a project in my field of research related to artificial intelligence. I had a little problem when I started to search in scientific papers. Since in some articles all kinds of neural networks are referred to as ANN ie CNNs and RNNs for example are also referred to as ANN . While in other articles, we only have multi-layer perceptrons (MLP) which are considered as artificial neural networks (ANN). From my simple experience, the first proposition makes the most sense, but I want to know the correct answer, in addition to whether MLPs can be considered a type of ANNs ?