Around 1980, Canon released some kanji electronic dictionaries. The UI was bonkers. This photo with an English cheat is fascinating. Especially compared to today's dictionary tools.
The Canon's LCD screen had low resolution and could display a couple of kanji. There was no stylus input. There were keyboard overlays and several user guides.
** I think there were 2 main models (the k models included a cartridge)
– CA2000K (￥39,800)- 18,777 items (2471 kanji, 5345 readings, 10,961 compounds). Included Cartridge CA20B.
– CA2000 (￥29,800)- (1945 kanji…)
– CA1000K (￥29,800)- 7,124 items (996 kanji, 2416 readings, 640 compounds, 3072 compounds in cartridge). Included Cartridge CA10J
– CA1000 (￥21,800)- (996 kanji…)
** The cartridges included:
– CA10J (￥8,000),(3072 compounds)
– CA20A (￥6,000 ), radical cartridge (4576 compounds)
– CA20B (￥10,000 ) radical and compound cartridge (360 kanji and 5957 compounds)
There was a brief instruction book in English but I have only seen one photocopied version (sold with a unit last year on ebay). The units pop up on ebay from time to time.
Here are some more photos
https://treasures.scss.tcd.ie/hardware/TCD-SCSS-T.20160121.005/TCD-SCSS-T.20160121.005.pdf
by Meister1888