Capital A Acid is a rudimentary acme interface to the debugger acid. It uses a win to provide an interactive window for acid. In that window, a couple of extra acme-specific features are enabled: w(command) runs the command and places its output in a new window. e.g. w(lstk()) places the stack trace in a distinct window. Also, in any such window, text executed with button 2 is presented as input to acid in the main Acid window. Thus, for example, one may evaluate variables presented in a stack trace by `executing' it with button 2.