Longman Dictionary of Contemporary English
Wiktionary
n. 1 A small portable book, containing eg. a diary, address book, notepad etc. 2 A portable electronic device performing similar functions.
WordNet
n. 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. [syn: personal digital assistant, PDA, personal organiser, organizer, organiser]
Wikipedia
A personal organizer, day planner, personal analog assistant, personal planner, year planner, or agenda (from Latin agenda - things to do), is a small book or binder that is designed to be portable. It usually contains a diary, calendar, address book, blank paper, and other sections. The organizer is a personal tool and may also include pages with useful information, such as maps and telephone codes. It is related to the separate desktop stationery items that have one or more of the same functions, such as appointment calendars, rolodexes, notebooks, and almanacs.
By the end of the 20th century, paper-and-binder personal organizers started to be replaced by electronic devices like personal digital assistants (PDAs), personal information manager software, and online organizers. This process has accelerated in the beginning of the 21st century with the advent of smartphones, tablet computers, smartwatches and a variety of mobile apps.
Usage examples of "personal organizer".
For each of us as individuals and for all of us as a society, technologies, some as old as the act of writing, some as modern as the electronic personal organizer, transform the way we conceive of and the way we use memory.
He jerked open his desk drawer to reveal his new personal organizer, a programmable calculator, a mini tape recorder, fold-up binoculars, and his working snacks.