Watching people playing the machines over long periods of time, the impressionistic evidence at least is that they are addictive to many people. With reel machines, the only way to win the maximum jackpot is to play the maximum numberof coins (usually 3, sometimes 4, or even 5 coins per spin). Instead, higher paying symbols will typically appear only once or twice on each reel, while more common symbols, earning a more frequent payout, will appear many times. Fruit machines are commonly found in pubs, clubs, and arcades. Despite the many varieties of pachislot machines, there are certain rules and regulations put forward by the Security Electronics and Communication Technology Association ( an affiliate of the National Police Agency. There are suggestions that the proliferation of poker machines has led to increased levels of problem gambling ; however, the precise nature of this link is still open to research. A virtual reel that has 256 virtual stops per reel would allow up to 2563 16,777,216 final positions. In the 1980s, however, slot machine manufacturers incorporated electronics into their products and programmed them to weight particular symbols. Category C edit Category C games are often referred to as fruit machines, one-armed bandits and AWP ( amusement with prize ). (The more, the better.) Scatter symbols are usually used to award a number of free spins. The laws regulating the use of gaming machines in Australia are a matter for State governments, and as such they vary between States. It is important that the machine contains a high-quality RNG implementation, because all prngs must eventually repeat their number sequence, 24 and if the period is short, or the prng is otherwise flawed, an advanced player may be able to 'predict' the next result. In these cases, the machines may be owned by the manufacturer, who is responsible for paying the jackpot. As there are so many combinations given by five reels, the manufacturers do not need to weight the payout symbols (although some may still do so). In online slot games, they can also be used for winning a jackpot, multiplying the prize and/or triggering a certain feature. The original conversion was applied to approximately 50 late model Bally slot machines. In 1984 Inge Telnaes received a patent for a device titled, "Electronic Gaming Device Utilizing a Random Number Generator for Selecting the Reel Stop Positions" (US Patent 4448419 22 which states: "It is important to make a machine that is perceived to present greater chances. A hand pay could also be necessary as a result of a short pay. United Kingdom edit Row of old fruit machines in Teignmouth Pier, Devon The provision of slot machines is covered by the Gambling Act 2005.