This 1988 paper reviewed the GUIs of knowledge-based systems such as expert systems and shells. It also covered Interlisp-D facilities and applications like LOOPS and KEE. https://www.cambridge.org/core/journals/knowledge-engineering-review/article/abs/graphical-interfaces-for-knowledge-engineering-an-overview-of-relevant-literature/DB1FADDBFC69E06FE2064994455D752A https://maxapress.com/data/article/ker/preview/pdf/S0269888900004483.pdf #gui #interlisp #ai #retrocomputing