Listing 11 shows you a drinks' list that lets the user opt out, or select from a list of possible non-alcoholic or alcoholic beverages.

清单11显示了一个饮料列表让用户选择，用户也可以从非酒精和酒精饮料中选择。

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Earlier this year, Catalog Choice launched MailStop, an iPhone app that lets people take photos of junk mail and send them to Catalog Choice to be put on an opt-out list.

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The Direct Marketing Association keeps a list of those who sign up at its site to opt-out of direct mail.

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