This paper surveys the work of the qualitative spatial reasoning group at the University of
Leeds. The group has developed a number of logical calculi for representing and reasoning …

Logo is more than a programming language. It is a learning environment where children
explore mathematical ideas and create projects of their own design. Logo, the first computer …

Seymour Papert once described the design of the Logo programming language as taking
the best ideas in computer science about programming language design and 'child …

Abstract Concurrent Constraint Programming (CCP) has been used over the last two
decades as an elegant and expressive model for concurrent systems. It models systems of …

Abstract The Attributed Graph Grammar system (AGG) provides a visual programming
environment which is based on graph transformation and Java. The idea is to program the …

The blocks programming community has been preoccupied with identifying syntactic
obstacles that keep novices from learning to program. Unfortunately, this focus is now …

Programming is central to computing. It is both the practical tool that actually puts the power
of computing to work and a source of intellectual stimulation and beauty. Therefore …

Notepad computers promise a new input paradigm where users communicate with
computers in visual languages composed of handwritten text and diagrams. A key problem …

The techniques developed by MM Brown and R. Sedgewick (1985) in using the Balsa
algorithm-animation system are reviewed. Techniques that focus on color and sound, areas …

A computer programming system provides animated program sources that are created in an
interactive visual manner. Animation is integrated with computer programming to allow a …