DESCRIPTION:
Reuploaded from:
http://people.csail.mit.edu/riastradh/InterlispSEdit.mov.bz2

Thanks to "lispm" on reddit for all the info:
https://www.reddit.com/r/lisp/comments/6iq2u8/how_was_lisp_edited_in_the_80s_and_90s/dj8n6yw/

From what I understand SEdit was developed later than DEdit. SEdit is documented first in the 1987 Lyric release of Interlisp-D, see Appendix B:
http://bitsavers.trailing-edge.com/pdf/xerox/interlisp-d/198706_Lyric/198706_3102434_Lyric_Release_Notes.pdf
SEdit is expanded in the virtual machine version of Interlisp-D, called Medley. See the Medley 1.0 release notes, appendix B:
http://bitsavers.trailing-edge.com/pdf/xerox/interlisp-d/198809_Medley_1.0/400006_Lisp_Release_Notes_Medley_Release_1.0_Sep88.pdf
Some hints for using SEdit
http://bitsavers.trailing-edge.com/pdf/xerox/interlisp-d/hotline/04_19871002.pdf
If you want to try it out, maybe this contains the editors:
http://www2.parc.com/isl/groups/nltt/medley/