Open Terminal is a smart store service that helps customers who visit the store to use the store continuously. By installing the Open Terminal app, you can easily provide smart services such as untact stamps, untact prepaid cards, and untact orders to customers who visit your store. untact stamp - Operate a smart stamp service that can turn a visitor into a regular customer. untact prepaid card - Issue a prepaid card and receive payment in an untact environment without contact with customers