Many of us can remember the one armed bandits at the end of the pier, or in the arcades when we were on holiday on a typically rainy day, with three reels and just one winning line. These machines were of course the first slot machines, which have now been developed into quite complicated machines where the gambler can have many choices to make. Slot machines now occupy the biggest floor area in most land based casinos, and are available in pubs and clubs throughout Ireland and the UK. Online casinos do not have the space restraints of land based casinos and have taken the concept of slot machines to a new level. Classic online casino slots can now have as many as five reels with five symbols in view on each reel, all of which can be part of a winning line. Even more winning lines can be found on the online casino video slots, which is the biggest range of slots available in the online casinos with Ladbrokes claiming to offer as many as 178 different versions of this casino game. The number of winning lines on video slots can complicate what used to be a simple casino game, and Bet365 now offer the opportunity for the casino slot gambler to choose how many winning lines they want to play, between 5 and 50. For online casino slot gamblers who want to play for big money there are the progressive slots, a range of which are available on the major online casinos, which continue to build a large jackpot until won. Online gamblers should remember that to play for the big money jackpots they need to be playing with the maximum stake, but the rewards can be huge. Online casino slots are great fun and the variations on offer should ensure that we can all find one to suit us.