purple monsters icons with purple background

>For other uses, see Halloween (disambiguation). Halloween is an observance celebrated on the night of October 31, most notably by children dressing in costumes and going door-to-door collecting candy. It is celebrated in much of the Western world, though most common in the United States, Puerto Rico, Ireland, the United Kingdom, Canada and sometimes in Australia and New Zealand. Irish, Scots and other immigrants brought older versions of the tradition to North America in the 19th century. Most other Western countries have embraced Halloween as a part of American pop culture in the late 20th century. See more at Wikipedia.org...

[he history of cryptography, 97-shiki-obun In-ji-ki (九七式欧文印字機) ("System 97 Printing Machine for European Characters") or Angooki Taipu B (暗号機B型) ("Type B Cipher Machine"), codenamed PURPLE by the United States, was a diplomatic cryptographic machine used by the Japanese Foreign Office during, and just before, World War II. The machine was an electromechanical stepping-switch device. See more at Wikipedia.org...]