A portable device performs a multiple recording function by which data is recorded using different recording techniques. The device includes at least one of an input unit and a touch panel, which creates or supports an input signal for activating an audio-related function and an input signal for activating the multiple recording function while the audio-related function is performed. The device further includes a display panel configured to output a memo writing screen of a memo function in response to the activation of the multiple recording function, the memo writing screen allowing the activation of a voice recording function. The device also includes a control unit configured to control the output of the memo writing screen.