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Grammatik is a standalone grammar checker, and was possibly the first grammar checker for personal computers. Later versions were built in to Word Perfect. It competed against RightWriter.
IBM Personal Computer Graphics Terminal Emulator is essentially a demonstration application developed using the IBM Graphical Kernel System. GKS is a shared, standardized graphics library, designed primarily to support IBM's high end CAD oriented IBM Professional Graphics Controller. GKS supports IBM's other video systems through the use of interchangeable device drivers.