oma定义的服务构建于IMS基础设施之上，如即时消息传递(Instant Messaging, IM)、在线状态服务和组管理服务等。

The services defined by OMA are built on top of IMS infrastructure, such as Instant Messaging (IM), Presence service, and Group Management service.

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这类用户需要基本的办公功能(如电子邮件、即时消息传递、公司门户、浏览器以及对文件和打印系统的访问)来完成日常工作。

These users require basic office functionality, such as email, instant messaging, company portals, browsers, and access to file and print systems, to do their daily jobs.

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