The AWS Documentation on Amazon Resource Names says
Some services let you specify a path for the resource name. For example, in Amazon S3, the resource identifier is an object name that can include slashes (/) to form a path. Similarly, IAM user names and group names can include paths.
This can be seen with the iam:CreateGroup call as an example.
What services other than S3 and IAM allow you to specify a path for a created resource?