1992 April 14, $li...@brandonu.ca, “Wish list, touch screen and pen based HP48sx!!!!!”, in comp.sys.hp48[1] (Usenet), retrieved 2022-05-19:
If possible, a touch pen on the HP48sx screen is better than a 'MoUsE' ball under the HP48sx.
1998 May 19, Steven L Cox, “Hello...”, in alt.games.video.tiger.game-com[2] (Usenet), retrieved 2022-05-19:
Where is the touchpen? Does the lack of a touchpen indicate the gcpp doesn't have touchscreen capabilities? How does this affect ClassiCom game compatability?
2005 August 16, Amund Trovåg, “Better touch pen for Meteos?”, in rec.games.video.nintendo[3] (Usenet), retrieved 2022-05-19:
As much as I love the game, I feel that the DS' touch pen is kinda big for that game. Any good suggestions to better touch pens?