The Dewey Decimal Classification (DDC) system is a general knowledge organization tool that is continuously revised to keep pace with knowledge. The system was conceived by Melvil Dewey in 1873 and first published in 1876. The DDC is published by OCLC Online Computer Library Center, Inc.

You can get messages with free chips delivered straight to your device throughout the day! When you turn on mobile notifications, you can also stay in the know about fun events and new slots. If you play DoubleDown Casino on your computer, you can also get free chips right there in your Facebook notifications!

DoubleDown Casino is intended for players 21 yrs+ and does not offer “real money gambling” or an opportunity to win real money or prizes based on the outcome of play.

Posts on Facebook are will always include a link within the post that will provide you with the chips. On a PC/Mac, just click on the link in the post. This will launch the game and award you the chips. On Mobile, tap the same link from within the Facebook app and you will see a new page.

With the Time Bonus, free chips are stacking up, just waiting to be collected. Collect as often as hourly, or let several hours’ worth stack up to collect all at once. If you have an active Booster, your Time Bonus can stack up four times; without a Booster, the Time Bonus stack maxes out at three.