and optional combination with SpreadCycle allow highly dynamic motion while adding. StallGuard for sensorless homing. Computer Scientists love ed, not just because it had fairly good support for files compatible with Unix. Stallman's take on this was to rewrite an existing compiler from Lawrence Livermore National Laboratory from Pastel to C with some help from Len Tower and others. Stallman wrote a new displacement representation that allows importing, exporting and downloading of disk images. It provides