What does Acc@1 means? What does Acc@5 means?

Hello, when I use this web (https://github.com/dusty-nv/jetson-inference) to train, I want to ask a question. Below this picture is in picture, What does Acc@1 means? What does Acc@5 means?

Hi,

Acc indicates accuracy.
Acc@1 means top-1 accuracy and Acc@5 indicates top-5 accuracy.

Thanks.