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Many believe that visual programming techniques are quite close to developers. This article reports on some fascinating research focusing on understanding how textual and visual representations for software differ in effectiveness. Among other things, it is determined that the differences lie not so much in the textual-visual distinction as in the degree to which specific representations support the conventions experts expect.

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???The original publication is available at www.springerlink.com???. Copyright Springer. [Full text of this article is not available in the UHRA]The Cognitive Dimensions of Notations framework has been created to assist the designers of notational systems and information artifacts to evaluate their designs with respect to the impact that they will have on the users of those designs. The framework emphasizes the design choices available to such designers, including characterization of the user???s activity, and the inevitable tradeoffs that will occur between potential design options. The resulting framework has been under development for over 10 years, and now has an active community of researchers devoted to it. This paper first introduces Cognitive Dimensions. It then summarizes the current activity, especially the results of a one-day workshop devoted to Cognitive Dimensions in December 2000, and reviews the ways in which it applies to the field of Cognitive Technology

As highlighted by the articles in this special issue, the concept of the Internet of Things is becoming increasingly important and understanding both the technical underpinning and wider societal impacts of the Internet of Things (IoT) will be crucial for digital citizens of the future. Building on extensive experience in delivering large--scale distance learning, The Open University has redesigned its introductory computer science curriculum to place the Internet of Things at the centre of students' experience, in a course called My Digital Life. In this article we present the design of this module, including a learning infrastructure that allows complete novices to experiment with, and learn about, Internet of Things technologies. We also share our experience of having almost 2000 students participate in the first presentation of the course, engaging in a range of activities that include collaborative and collective programming of real--world sensing applications.