This chapter introduces widely used deep learning platforms and algorithms within academia and industry contexts. It covers two key areas: deep learning platforms and classic algorithms in the field of artificial intelligence. This chapter also introduces prominent classic deep learning frameworks like TensorFlow, PyTorch, and PaddlePaddle, highlighting their unique features and roles in facilitating deep learning development. Additionally, it discusses classic algorithms like CNN, LSTM, RNN, GAN, etc., and their applications for the two major tasks of computer vision and natural language processing.