Slot machines have been around since the 1800s, and were originally installed in casinos and saloons for use by those without enough gambling knowledge to tackle the craps, blackjack, or difficult poker tables.

In recent years, slot machines continue to be in use across the globe, although online slots, or virtual slots, are proving to be an ever-growing internet hit.

Here are a few bits of information for knowledgeable gambling:

In first production, slot machines contained a series of drums, which rotated around a main cog at varying speeds. The drums would slow down until eventually come to a halt, and winnings were decided by the 'payline'.

This payline is still in use today but has been converted to video reels, and similar site has increased from an individual horizontal line, to a series of multiple horizontal and diagonal lines which provide various combinations of betting tactics and payoffs.