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When Was the RNG First Implemented in Slot Machines?

When Was the RNG First Implemented in Slot Machines?

The first true slot was known as the Liberty Bell. There had been many similar inventions in the preceding decade, but these were novelty items at best. Although they were played by dropping coins and pulling a lever, these machines lacked a payout system, and individual venues determined the prizes. Payouts were in free drinks, cigarettes, and other similar items.

Charles Fey’s Liberty bell was very similar to the modern-day slots. The first machine was developed in 1897, and after a few years, several developers started copying it. These early machines didn’t use random number generators (RNGs)and instead relied on a simple system of gears. Reels were spun by pulling a lever. The machines were very much in favor of the house, which meant that the players were disadvantaged.

The First Random Number Generator

The first true random number generator (RNG) was introduced in the 1940s. It was a development of the RAND Corporation, but they were not used in any commercial software or hardware. It was the first sign that computers could calculate big numbers quickly and would bring a change to the gambling world, and slot machines in particular.

In the 1980s and 1990s, when computers underwent a revolution, many slots still relied on mechanics. At this time, slot machine developers started to create more reliable and advanced random number generators.


Things changed for the better in the millennium when slots shifted from land-based casinos and pubs to the online world. Today, advanced RNGs are available and take up very little space and memory, and they can make every spin on slots completely random and fair.

How Random Number Generators Work

Random number generators work by choosing a series of numbers, going for a billion, and more. The chosen number changes constantly, and it stops when the reels start spinning. The number that the RNG shows at this point determines the position of each reel, and after selecting the number, it displays the spin’s outcome. Usually, it is not a predetermined sequence of events, and no program indicates that the jackpot will be hit at a specific time or that the machine will lose or win a particular amount of time.

Whether an individual wins or loses is determined by what the random number generator displays at the exact moment. If you were to repeat your actions exactly but delay by a millisecond, the outcome of each spin would be different.


Difference Between True RNGs (RRNGs) and Pseudo RNG (PRNGs)

True RNGs differ from Pseudo RNGs because they don’t need to create seed values. Instead, TRNGs use numerical abbreviations for natural sounds similar to those from a semiconductor resistor. Additionally, no algorithm determines its effectiveness. This makes the slot machines of today more advanced than the previous versions.

On the other hand, Pseudo RNGs are a type of software-based RNG. These RNGs use mathematical algorithms to perform random numbers. In this case, the seed has to begin the process.

Slot machines RNGs are an important aspect, these random generators ensure that all machines are random and fair, meaning that all gamers have equal chances of winning.

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