workboy, game boy peripheral, cancelled, displayed at the consumer electronics show (1992) 'a pda-style, keyboard addon for the game boy with calendar, phone book & convert measurement functions.' https://archive.org/details/micomBASIC-1992-04/page/3/mode/2up https://gamehistory.org/ep-16-the-elusive-workboy-with-liam-robertson/
@moshboy I guess they were looking to go after Casio diaries and the like that used to be rather popular back then.
But it would have been very awkward for the common japanese salaryman of the time.