A professional who operates automatic photocomposing-perforator machine equipped with keyboard to copy data from manuscript onto tape used in photocomposing machine. Responsibilities include:

• Inserts $T3paper tape$T1 in perforator.
• Clips copy in copy holder and starts perforator mechanism.
• Sets indexed dials to select line length, type size, film feed, and type face specified on manuscript.
• Depresses keys of keyboard to perforate coded signals in paper tape for subsequent activation of photocomposing machine.
• Removes perforated tape from perforator.
• Important variables are trade names of system operated.
• May operate similar machine equipped with video display terminal to edit and correct perforated tape as indicated by proofreader on reproduction proof.