What are the four most common computer-based information systems?

什么是四种最常见的电脑为基础的信息系统？

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Intelligent agents are special purpose knowledge-based information systems that accomplish specific tasks for users.

智能代理属特殊用途以知识为基础的信息系统，完成具体任务，为用户。

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An approximate approach of querying between heterogeneous ontology-based information systems based on an association matrix is proposed.

提出一种基于关系矩阵的异构本体信息系统间近似查询方法。

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The original patent was filed after work done on text based information systems such as Prestel by the General Post Office (GPO).

BBC: BT claims patent on web links

Or in the architecture of cloud-based information technology systems?

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Hauguel, a home-based, certified information-security systems consultant in Phoenix.

FORBES: Magazine Article