Language designer. Creations include
   * Algol W [http://www.instantweb.com/foldoc/foldoc.cgi?ALGOL+W]
   * [Pascal] (what year?)
   * [Modula 2]
   * [Oberon]
   * LoLa (Logic Language, a [HDL])

"You can call me by name 'Wirth' or value 'Worth' ;-)"
is a witty reply rather famously attributed to him.
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[Category Person]