The audience for this survey of codes used in actual systems is readers with a basic knowledge of coding theory. The paper surveys error control in high-speed memories, mass memories, and processors and then reviews unidirectional error-control codes. It covers single- and multiple-bit and byte error detection and correction schemes along with the popular single-error-correction, double-error-detection codes. Error control codes applicable to tapes and discs (optical, compact, and WORM) are described. The authors only present one processor error control technique, but they give a fine introduction to unidirectional codes. They predict that the current trend of reduced cost for error-control coding will result in more applications for these coding schemes and that cost-effective low-level coding techniques may offset the need for massive high-level redundancy.

The paper is well written and covers a large body of material. A good understanding of the basics of coding theory is a prerequisite.