No abstract available.

Gesture-based interfaces offer an alternative to traditional keyboard, menu, and direct manipulation interfaces. The ability to specify objects, an operation, and additional pa-rameters with a single intuitive gesture appeals to both novice and experienced users. Unfortunate y, gesture-based interfaces have not been extensively researched, partly be-cause they are difficult to create. This paper describes GRANDMA, a toolkit for rapidly adding gestures to di-rect manipulation interfaces. The trainable single-stroke gesture recognize used by GRANDMA is also described.

Treat is a special purpose language for use in compiler writing. A Treat program translates a graph into c-trees (the intermediate language of the pcc compiler) and uses the back end of the C compiler to generate code. Treat has been developed specifically for use in an AdaTM compiler. A Treat program consists of applicative transformation rules. Treat's distinctive aspects include triggering transformations during pattern matching, a context mechanism for dynamic binding and assignment in a language with lazy evaluation.