Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels.

From the tools we'll use, to our process, to the behaviors that will change the way we design.

Katie Fenn opens the door on our 2018 season by transporting us back to the turn of the century when new lessons were being learned about security.

Christmas HQ is your headquarters for everything you'll need to celebrate the holidays.

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