Charles Macintosh
 /ˌtʃɑːlz ˈmækɪntɒʃ/
  /ˌtʃɑːrlz ˈmækɪntɑːʃ/
- (1766-1823) a Scottish inventor who developed a material made of rubber to keep out water. A ' mackintosh' or 'mac' is now a word for any coat made of a similar material for keeping off rain.