The original slot machine was a mechanical machine with 3 reels. These reels displayed all of the symbols and pay lines. Nowadays every slot machine with 3 reels is called a reel slot or classic slot. This doesn’t mean that all these machines are mechanical. The reels are also computerized and completed with a random generator that defines the wins.
To distinguish classic online slots and video slots we can take a look at a number of things: the themes, the number of wheels and the amount of paylines for example. Classic slots tend to use popular symbols like fruit symbols and have ‘only’ 3 wheels accompanied by less paylines and less advanced bonus rounds and other special functions in comparison with video slots. Less paylines? Less money to be won you might think. This is not true! 3 wheels slots pay more often compared to 5 wheel video slots, but with smaller amounts.