This chapter introduces the network sample with frequent modules. Sample networks are available from HARK wiki. All standard network configurations are available and therefore the network that the user wishes to create may be already registered as a sample. Therefore, it is recommended to read the category outline of sample networks. Even if there is not the desired network, it is comparatively easier to revise a sample network in the category that is close to the desired network to create the desired network. The sample networks are categorized for each function. The description is summarized simple as possible and therefore it is for training of HARK modules.