IBM Simon
1 2 3 4 5 Sager, Ira (2012-06-29). “Before IPhone and Android Came Simon, the First Smartphone”. Bloomberg Businessweek (Bloomberg). ISSN 2162-657X. http://www.businessweek.com/articles/2012-06-29/before-iphone-and-android-came-simon-the-first-smartphone 2012年6月30日閲覧. "Simon was the first smartphone. Twenty years ago, it envisioned our app-happy mobile lives, squeezing the features of a cell phone, pager, fax machine, and computer into an 18-ounce black brick."
1 2 3 O'Malley, Chris (1994-12). “Simonizing the PDA”. Byte (Mc-Graw Hill Publishing Company) 19 (12): 145-148. ISSN 0360-5280. オリジナルの1999-02-21時点におけるアーカイブ。. https://web.archive.org/web/19990221174856/byte.com/art/9412/sec11/art3.htm 2012年6月30日閲覧.