Abstract
In this article, I investigate an alternative place for the computer with respect to human cognition. Instead of the computer as a model of the human being, I explore the computer in its role as mediator of human activity based on activity theory. In particular, I discuss various metaphors for this role, including that of a tool, and I look at possible roles for the computer in development of human work activity. I emphasize further the importance of the design of this alternative place. I use an example from a computer application in use in a real work setting to illustrate my points.

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