43_a_history_of_qed
According to George Coulouris, vi was based on (or at least inspired by) the em editor done at Queen Mary College in London.

0043_0006__was was 0043_0002__George_0043_0003__Coulouris george_coulouris 0043_0006__was->0043_0002__George_0043_0003__Coulouris according_to[nim] 0043_0010__or or 0043_0006__was->0043_0010__or [scope] 0043_0007__based based 0043_0010__or->0043_0007__based [conj1] 0043_0012__inspired inspired 0043_0010__or->0043_0012__inspired [conj2] 0043_0005__vi vi 0043_0007__based->0043_0005__vi [arg1] 0043_0015__the_0043_0016__em_0043_0017__editor the_em_editor 0043_0007__based->0043_0015__the_0043_0016__em_0043_0017__editor on[clr] staz_0043_5005 * 0043_0007__based->staz_0043_5005 [arg0] 0043_0012__inspired->0043_0005__vi [arg1] 0043_0012__inspired->0043_0015__the_0043_0016__em_0043_0017__editor by[nim] 0043_0012__inspired->staz_0043_5005 [arg0] 0043_0011__at_least at_least 0043_0012__inspired->0043_0011__at_least [nim] 0043_0018__done done 0043_0018__done->0043_0015__the_0043_0016__em_0043_0017__editor [arg1] 0043_0022__College college 0043_0018__done->0043_0022__College at[nim] staz_0043_5003 * 0043_0018__done->staz_0043_5003 [arg0] 0043_0020__Queen_0043_0021__Mary queen_mary 0043_0022__College->0043_0020__Queen_0043_0021__Mary [modifier] 0043_0024__London london 0043_0022__College->0043_0024__London in
arc(r_0043_0006__was,r_0043_0002__George_r_0043_0003__Coulouris,r_0043_0001__According_to__nim).
arc(r_0043_0006__was,r_0043_0010__or,keep_scope).
arc(r_0043_0007__based,r_0043_0005__vi,arg1).
arc(r_0043_0007__based,r_0043_0015__the_r_0043_0016__em_r_0043_0017__editor,r_0043_0008__on__clr).
arc(r_0043_0007__based,star_z_0043_5005,arg0).
arc(r_0043_0010__or,r_0043_0007__based,conj1).
arc(r_0043_0010__or,r_0043_0012__inspired,conj2).
arc(r_0043_0012__inspired,r_0043_0005__vi,arg1).
arc(r_0043_0012__inspired,r_0043_0011__at_least,nim).
arc(r_0043_0012__inspired,r_0043_0015__the_r_0043_0016__em_r_0043_0017__editor,r_0043_0013__by__nim).
arc(r_0043_0012__inspired,star_z_0043_5005,arg0).
arc(r_0043_0018__done,r_0043_0015__the_r_0043_0016__em_r_0043_0017__editor,arg1).
arc(r_0043_0018__done,r_0043_0022__College,r_0043_0019__at__nim).
arc(r_0043_0018__done,star_z_0043_5003,arg0).
arc(r_0043_0022__College,r_0043_0020__Queen_r_0043_0021__Mary,modifier).
arc(r_0043_0022__College,r_0043_0024__London,r_0043_0023__in).


IP-MAT PP-NIM P-ROLE According_to NP NPR George NPR Coulouris PUNC , NP-SBJ NPR vi BED;~cat_Ve_passive_ was IP-PPL-CAT NP-LGS * ILYR ILYR VVN;~phr_Vn.pr based PP-CLR P-ROLE on NP *ICH*-135 PULB -LRB- CONJP CONJ or ILYR ADVP-NIM ADV at_least VVN;~Tn.pr inspired PP-NIM P-ROLE by NP *ICH*-135 PURB -RRB- NP-RNR-135 D the NPR em N editor IP-PPL NP-LGS * DON;~Tn done PP-NIM P-ROLE at NP NLYR NPR Queen NPR Mary NPR College PP P-ROLE in NP NPR London PUNC .
( (IP-MAT (PP-NIM (P-ROLE According_to;{according_to})
                  (NP (NPR George;{George})
                      (NPR Coulouris;{Coulouris})))
          (PUNC ,)
          (NP-SBJ;{VI} (NPR vi;{vi}))
          (BED;~cat_Ve_passive_ was;{be})
          (IP-PPL-CAT (NP-LGS *)
                      (ILYR (ILYR (VVN;~phr_Vn.pr based;{base[on]})
                                  (PP-CLR (P-ROLE on;{on})
                                          (NP *ICH*-135)))
                            (PULB -LRB-)
                            (CONJP (CONJ or;{or})
                                   (ILYR (ADVP-NIM (ADV at_least;{at_least}))
                                         (VVN;~Tn.pr inspired;{inspire})
                                         (PP-NIM (P-ROLE by;{by})
                                                 (NP *ICH*-135))))
                            (PURB -RRB-))
                      (NP-RNR-135 (D the;{the})
                                  (NPR em;{em})
                                  (N editor;{editor})
                                  (IP-PPL (NP-LGS *)
                                          (DON;~Tn done;{do})
                                          (PP-NIM (P-ROLE at;{at})
                                                  (NP (NLYR (NPR Queen;{Queen})
                                                            (NPR Mary;{Mary}))
                                                      (NPR College;{College})
                                                      (PP (P-ROLE in;{in})
                                                          (NP (NPR London;{London}))))))))
          (PUNC .))
  (ID 43_a_history_of_qed))