Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	John R. Ellis, A Lisp shell, ACM SIGPLAN Notices, v.15 n.5, p.24-34, May 1980  [doi>10.1145/947639.947642]
	2	Mark Green, A methodology for the specification of graphical user interface, ACM SIGGRAPH Computer Graphics, v.15 n.3, p.99-108, August 1981
	3	Computer Graphics staff, Status report of the graphic standards planning committee, ACM SIGGRAPH Computer Graphics, v.13 n.3, p.1-10, August 1979  [doi>10.1145/988497.988498]
	4	Paul R. Hanau , David R. Lenorovitz, Prototyping and simulation tools for user/computer dialogue design, ACM SIGGRAPH Computer Graphics, v.14 n.3, p.271-278, July 1980
	5	John Levine, Why a Lisp-based command language?, ACM SIGPLAN Notices, v.15 n.5, p.49-53, May 1980  [doi>10.1145/947639.947645]
	6	Newman, William M. A System for Interactive Graphical Programming. Spring Joint Computer Conference, (1968), 47.
	7	William M. Newman , Robert F. Sproull, Principles of interactive computer graphics (2nd ed.), McGraw-Hill, Inc., New York, NY, 1979
	8	Dan Reed Olsen, Jr., Procedure based generalized interactive systems, 1981
	9	Sutherland, Ivan E. Computer Graphics: Ten Unsolved Problems. Datamation 12, 5 (May 1966), 22--27.
	10	Anthony I. Wasserman, User Software Engineering and the design of interactive systems, Proceedings of the 5th international conference on Software engineering, p.387-393, March 09-12, 1981, San Diego, California, United States