State of the Computer Book Market 2008, Part 2: The Technologies

In this second installment (the first post is found here), we look at computer book sales in specific technology categories. Remember that we've organized the data into six "Category Families" -- Systems and Programming, Web Design and Development, Business Applications, Digital Media Applications, Consumer Operating Systems and Devices, and Other. Within each Family are category group, super-category, category, and atomic category, in a five-level hierarchy. For example, Systems and Programming includes programming languages, databases, software engineering, general programming, security, and so on. In the rest of this post, we will contrast Q4 2007 with Q4 2008 and the whole year of 2007 with 2008.

As a refresher, here is a new treemap of the Category Families with their sub areas for Q4 2008 compared to Q4 2007. In this view, we've changed the thickness of the borders to highlight the category hierarchy.

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