[
  {
    "url": "https://towardsdatascience.com/binary-hex-and-octal-in-python-20222488cee1",
    "description": "Binary, octal, hex in python"
  },
  {
    "url": "https://en.wikipedia.org/wiki/Numeral_system",
    "description": "Numeral system"
  }
]
