organizer

noun

1. A person who arranges the details of a public event.

   “Jennifer Pastore Monroy, executive director of the National Association of Productivity and Organizing Professionals, emphasized that “the relationship that clients build with a professional organizer is a very personal one, and so your experience will depend on what you’re trying to get out of it.” […] “Professional organizers and productivity consultants work a whole spectrum of services to help people,” she explained.”

2. A hand-held micro-computer that will perform specific tasks; can be used as an electronic diary, alarm clock, recorder of memos and notes, a portable database etc.

   “I'll add that meeting to my organizer.”

3. A non-electronic notebook or calendar or something similar, used to organize one's affairs.
4. A group of cells that, together with the evocator, control differentiation in the embryo; the inductor
5. a recipient, such as a box or a case, used for storing gadgets, trinkets and other knick-knacks; an organizer box

   “desk organizer”

   “makeup organizer”