Moreover, Smalltalk and Interlisp interactions are recorded in files automatically--the changes file, the sources file, and the working image (which also contai

Moreover, Smalltalk and Interlisp interactions are recorded in files automatically--the changes file, the sources file, and the working image (which also contains tools--e.g. Interlisp's Masterscope--for keeping track of changes). The notion that you'll lose your work if you use the normal means of interacting with the repl is a misunderstanding of how such systems work.