BBN Lisp and its successor Interlisp, popular in the 1960s and 70s, had a persistent data store that was more closely integrated with the running Lisp image tha

BBN Lisp and its successor Interlisp, popular in the 1960s and 70s, had a persistent data store that was more closely integrated with the running Lisp image than typical general-purpose file systems (slide 41 in [1]) The proposed (but apparently un-implemented) LispOS [2] was to have a single-level store where objects in the running Lisp image would be transparently checkpointed to disk, with no conventional file system. [1] http://www.international-lisp-conference.org/2005/media/baker-slides.pdf http://www.international-lisp-conference.org/2005/media/bake... [2] https://github.com/robert-strandh/LispOS/blob/master/Documentation/chap-intro.tex https://github.com/robert-strandh/LispOS/blob/master/Documen..., also chap-checkpointing.tex