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A service offering is a set of virtual hardware features such as CPU core count and speed, memory, and disk size. The &PRODUCT; administrator can set up various offerings, and then end users choose from the available offerings when they create a new VM. A service offering includes the following elements: CPU, memory, and network resource guarantees How resources are metered How the resource usage is charged How often the charges are generated For example, one service offering might allow users to create a virtual machine instance that is equivalent to a 1 GHz Intel® Core™ 2 CPU, with 1 GB memory at $0.20/hour, with network traffic metered at $0.10/GB. Based on the user’s selected offering, &PRODUCT; emits usage records that can be integrated with billing systems. &PRODUCT; separates service offerings into compute offerings and disk offerings. The computing service offering specifies: Guest CPU Guest RAM Guest Networking type (virtual or direct) Tags on the root disk The disk offering specifies: Disk size (optional). An offering without a disk size will allow users to pick their own Tags on the data disk