Leo's computer screen goes from columns to a school website back to the columns. He never touches the keyboard.
When talking to Burr Redding, the manager of the call center says there are "20,000" prisoners in Oz. According to a 2010 article in the New York Times, Louisiana State Penitentiary (known as Angola) was the largest maximum security prison in the United States. It houses only 5,000 inmates (on more land than the island of Manhattan).
So either she is mistaken, or Oz is four times bigger than the largest actual max-security prison in the US.
So either she is mistaken, or Oz is four times bigger than the largest actual max-security prison in the US.