Electronic organizer

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An electronic organizer (or electric organizer) is a small calculator-sized computer, often with an in-built diary application but few other functions such as an address book and calendar. It normally has a small alphanumeric keypad and an LCD screen of one, two or three lines.

Opened Sharp Electric Organizer model (sold as Sharp Wizard in the US) model ZQ-770.
Casio SF-R20 Digital Diary featuring 256KB RAM, from around 1993.
Casio Business Navigator BN-40A.

Because of the advent of personal digital assistants, and later smartphones in the 2000s and 2010s respectively, both of which have a larger set of features, electronic organizers are rarely seen today.

Casio digital diary[edit]

Casio digital diaries were produced by Casio in the early and mid 1990s, but have since been entirely superseded by Mobile Phones and PDAs.


  • Telephone directory
  • Schedule keeper: Keep track of appointments.
  • Memo function: Store text data such as price lists, airplane schedules, and more.
  • To do list: Keep track of daily tasks, checking off items as you complete them.
  • World time: Find out the current time in virtually any location on the globe.
  • Secret memory area: The secret memory area keeps personal data private. Once a password is registered, data is locked away until the password is used to access the secret area.
  • Alarm
  • Metric conversion function: Conversion between metric units and another measurement unit.
  • Currency conversion function
  • Game: Some machines included a game such as Poker or Blackjack.

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