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Communications of the ACM

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President's letter


ACM forum


Programming pearls


Case study: IBM's system/360-370 architecture

The architecture of IBM's System/360-370 series of compatible processors is one of the most durable artifacts of the computer age. Through two major revisions of the product line and 23 years of technological change, it has remained …

Attributes of the performance of central processing units: a relative performance prediction model

Using readily available data on CPU characteristics—main memory size, cache memory size, number of channels, and machine cycle time—it is possible to predict relative CPU performance for a wide range of machines. Statistical  …

Computing multi-colored polygonal masks in pipeline architecture and its application to automated visual inspection

New techniques for computing multicolored polygonal masks for image analysis and computer vision applications are presented. The procedures do not require random access of the image memory. They are based on efficient generation …