8.3 Computer graphics Enhancing the Value of Graphics Programs, Clifford H. Wagner, 18:2, 1987, 142-152, 8.1 Drawing a Circle, Harley Flanders, 19:1, 1988, 72-78 Parametric Surfaces, Harley Flanders, 19:5, 1988, 444-447, 5.6.1 The Curious Fate of an Applied Problem, Alan H. Schoenfeld, 20:2, 1989, 115-123, 5.1.5, 9.5 The Matrix of a Rotation, Roger C. Alperin, 20:3, 1989, 230, C, 4.3 Image Expansion in Integer Arithmetic, Mark Bridger, 22:5, 1991, 429-435 Calculus and Computer Vision, Mark Bridger, 23:2, 1992, 132-141, 5.7.1 The Flowering of String Rewriting Systems, Anne M. Burns, 23:3, 1992, 225-236, 8.2 Fireworks, J. M. A. Danby, 23:3, 1992, 237-240, C, 6.2 Complex Vectors and Image Identification, Lyndell Kerley and Jeff Knisley, 24:2, 1993, 166-174, 9.6 A Computer Lab for Multivariate Calculus, Casper R. Curjel, 24:2, 1993, 175-177, C, 1.2, 5.7.1 Making Mountains from a Sum of Molehills, Anne M. Burns, 26:1, 1995, 51-57 Modeling Trees with a Stochastic Matrix, Anne M. Burns, 29:3, 1998, 230-236, 3.1 Breaking the Holiday Inn Priority Club CAPTCHA, Edward Aboufadel, Julia Olsen, and Jesse Windle, 36:2, 2005, 101-108, 4.7, 9.10