A keyboard is disposed on a front side of an upper surface of a housing
and a display unit is disposed on a rear side of the housing upper
surface. The housing houses therein a printer mechanics unit at a
position just under the keyboard. The housing houses therein a control
board on a back side of the display unit, the control board carrying a
microcomputer thereon. The housing further houses therein a roll paper
receptacle portion at a position just under the display unit and the
control board, the roll paper receptacle portion accommodating
removablely roll paper to be fed to the printer mechanics unit. According
to this construction, the housing is not required to extend backward to
ensure a mounting space for the roll paper receptacle portion, that is,
the size of the device is reduced.