|Batteries:||CR 2032 x 2 + CR 1220 x 1 (Memory backup)|
This is Casio's very first Digital Diary, introduced in May 1983.
Many more models where to follow this early one.
This organiser has a phone memory for phone numbers and names. It also has a memo function for general notes. There's also a basic function calculator and a spread-sheet like ability.
Its basic memory is just a mere 961 bytes, but this is extendable with an additional 2kB module.
©2009 Ernst Mulder