The explosion in “cloud computing” as a moniker has made it difficult to distinguish the difference between various types of services. We suggest three basic categories: File lockers, online backup services, and online archives. Archiving services are currently marketed towards businesses, not consumers. Amazon Glacier attracted a great deal of attention when it launched a few weeks back, but it’s not intended for just anyone to use. There’s no management console of any kind, and data transfers are handled via Java or .NET scripts. This article uses the phrase “online backup service” and “cloud backup service” interchangeably.