Related Work - Transparent Windows

• PAD, PAD ++ (Perlin & Fox 1993, Bederson & Hollan 1994)
  
• Toolglass & Magic Lenses (Bier, Stone et al. 1993)
  
• Translucent Patches (Kramer 1994)
  
• Electronic Cocktail Napkin (Gross 1994, Gross & Do 1996)
  
• Transparent Medium (Trinder 1999)