organizer

(noun) a person who brings order and organization to an enterprise. Synonyms: organiser, arranger. Example: "She was the organizer of the meeting."

(noun) someone who enlists workers to join a union. Synonyms: organiser, labor organizer.

(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.. Synonyms: personal digital assistant, PDA, personal organizer, personal organiser, organiser.