Developments in process (on-line) gas chromatography are discussed with a focus on the chromatographic performance. Such improved performance, coupled with on-going micro-electronic and computer improvements, is shown to result in very economically efficient, sensitive and fast chromatography. A few examples are given where this improved performance is demonstrated. The impact of new computer networking technology is highlighted, and a few areas, which continue to be problematic for process chromatographic technology, are discussed.