RESIDENT [command1] [command2] ...

* RESIDENT allows you load commands into memory, such that they
  will execute immediately, rather than be loaded from disk all the
  time. The benefit of RESIDENT over saving commands on the RAM:
  disk is that only one copy of the command is in memory all the
  time. RAM: based commands will use up twice as much memory when
  the command is being executed.

* The limitation of RESIDENT is that only certain commands will
  work. Generally, all commands which have their PURE bit (see
   PROTECT ) set can be made RESIDENTABLE. However, RESIDENT
  does not check whether the PURE bit is set before loading, and
  hence you can try out commands to see if they work. They'll
  always work the first time. Its only when executing the 2nd
  time that the Amiga will likely crash.
  Note: Crunched programs will most likely not work.

* Typing RESIDENT with no parameters will show the current list
  of resident commands:
    ADRESS is useful for programmers
    USECOUNT says how many times it is used right now
             ROM internal residents have negative values
    NAME means the name  (hard to guess :)

* Typing one or more command names after RESIDENT will make those
  commands resident. ZShell will search the command search  path 
  to try and find them.

eg.     resident c/list c/cd c/date c/avail
        resident ed