Hand-held organizer and Personal digital assistant

Personal digital assistant and hand-held organizer are semantically related in agenda book topic. In some cases you can use "Personal digital assistant" instead a noun phrase "Hand-held organizer".

Personal digital assistant noun - A lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasks; can serve as a diary or a personal database or a telephone or an alarm clock etc..

Hand-held organizer and personal digital assistant are semantically related in agenda book topic. You can use "Hand-held organizer" instead a noun phrase "Personal digital assistant".