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     SPELL(1)                                                 SPELL(1)

          spell - find spelling errors

          spell [ option ] ...  [ file ] ...

          Spell looks up words from the named files (standard input
          default) in a public spelling list and in a private list.
          Words that occur in neither and are not plausibly derivable
          from words in the public list are placed on the standard

          Spell ignores most troff, tbl, pic, and eqn(1) construc-
          tions.  It understands these options:

          -b   check British spelling

          -v   print all words not literally in the spelling list,
               with derivations

          -x   print, marked with `=', every stem tried in both stop
               list and spelling list

          The private list, by default $HOME/lib/spelldict, is
          arranged one word per line.

          Pertinent auxiliary files may be specified by environment
          variables, indicated below with their default settings.
          Copies of all output are accumulated in the history file, if
          it is writable.  The stop list filters out misspellings
          (e.g. thier=thy-y+ier) that would otherwise pass.

          D_SPELL=/usr/dict/hlist[ab]: hashed public lists, American &
          S_SPELL=/usr/dict/hstop: hashed stop list
          H_SPELL=/usr/dict/spellhist: history file
          A_SPELL=$HOME/lib/spelldict: private list
          P_SPELL=/usr/lib/spell: the main routine
          deroff(1), sort(1), tee(1), comm(1)


          A malicious opponent can defeat spell's heuristics for word
          derivation, but this rarely happens in practice.
          The spelling list's coverage is uneven; in particular biol-
          ogy, medicine, and chemistry are covered very lightly.  New

     SPELL(1)                                                 SPELL(1)

          installations will probably wish to monitor the output for
          several months to gather local additions.
          British spelling was done by an American.