Bingo card cards to overcome the difficulty with randomization. There are two types of Bingo cards. One is a 5x5 grid meant for 75-ball Bingo, which is largely played in the U.S. The other uses a 9x3 grid for U.K. style "Housie" or 90-ball Bingo. Players use cards that feature five columns of five squares each, with every square containing a number (except the middle square, which is designated a "FREE" space). The columns are labeled "B" (numbers 1–15), "I" (numbers 16–30), "N" (numbers 31–45), "G" (numbers 46–60), and "O" (numbers 61–75). A popular Bingo myth claims that U.S. Bingo innovator Edwin
National Bingo Game and the National Prize is presently in the region of £5,000–25,000, depending upon the day of the week and session played, plus the Jackpot Prize – see § New Game. Many players prefer to purchase a strip of six tickets, as this guarantees that all numbers 1–90 appear on the strip, so the players know that they will be marking the strip each and every time a number is called. Technology has improved since the game began in 1986 and currently ADSL secure internet connection is used to collect and distribute data. The National Bingo Game has been in operation