Command operators:

set {slot expr}+                         set slot values

unset slot+                         unset slot values

increment {slot expr}+               increment slot values

scale {slot expr}+                    multiply slot values

transpose {slot expr}+               transpose slot values

invert {slot expr}+                    invert slot values

change newclass {newslot oldslot}*     change class of objects

insert object                         put object before current

append object                         put object after current

delete object                         mark object as deleted

undelete object                         mark object as undeleted

hide object                         mark object as hidden

unhide object                         mark object as unhidden

print expr                              print value of expr to terminal

do expr                              Lisp evaluate expr

Clause operators:

and                                   conjunction of two clauses

when expr clause                         evaluate clause if expr is true

unless expr clause                    evaluate clause if expr is false

while expr clause                    map as long as expr is true

until expr clause                    map as long as expr is false