This reminds me of an old electronic organiser / PDA that was available in the 80s/90s that had just five (I think) keys for typing. Letters were formed by pres

This reminds me of an old electronic organiser / PDA that was available in the 80s/90s that had just five (I think) keys for typing. Letters were formed by pressing the keys in combination. Skilled users could type very quickly on it. I can't remember the name of it now. "Jaguar" is in my head, but I think I'm conflating it with the Atari console.