If you have ever sat in a casino and lost rolls of quarters (or pennies) in slot 4️⃣ machines, odds are those machines were manufactured by IGT. International Game Technology's Las Vegas campus includes a three story office 4️⃣ building and warehouse used for manufacturing slot machines.

International Game Technology Manufacturing Facility

The most basic answer to the question of 4️⃣ how do I play slots?  is that you insert your wager, press the button, or pull the handle, and 4️⃣ hope for the best. But of course, there's a little more to it than that. With each spin, a combination 4️⃣ of symbols is revealed resulting in different levels of payouts.

How to Play Slots in Las Vegas - Golden Gate Casino