Table 2. Prime features of ANN, CNN and RNN.

ANN: Artificial Neural Networks; CNN: Convolutional Neural Networks; RNN: Recurrent Neural Networks

	ANN	CNN	RNN
BASICS	Simplest	Popular	Advanced and complex
STRUCTURAL LAYOUT	Information flows in one direction	Information flows through more convolutional layers	Information flows in different directions
DATA TYPE	Tabular and text data	Image data	Sequence data
COMPLEXITY	Simple in contrast	More powerful	More powerful
COMMENDABLE FEATURE	Ability to work with incomplete knowledge	Accurate in recognizing images	Memory and self-learning
SPATIAL RECOGNITION	no	yes	no
RECURRENT CONNECTIONS	no	no	yes
MAIN DRAWBACK	Hardware dependence	Large training data required	Slow and complex training
USES	Complex problem solving	Image recognition	Natural language processing and sentimental analysis