Music pen

a pen for ruling at one time the five lines of the musical staff.
a pen having five points for drawing the five lines of the staff.

See also: Music, Pen

References in periodicals archive ?
companies -- IBM and Music Pen -- that have signed memoranda of understanding to provide services on Singapore ONE.
Music Pen's Wu reflects the views of the multinational corporations involved in Singapore ONE when she says, "We chose Singapore because it has tremendous foresight.