A CAL is short for a Crochet-Along. A pattern is posted by the designer in several parts. Everyone who joins the CAL then works on the pattern using their own choice of yarn or thread colors. As the pattern progresses, pictures are posted by the participants. The fun part is seeing what colors everyone uses for their project.
Celinda over at Crochet Memories is holding a Crochet-Along right now for a beautiful crochet doily.
.The first part of the doily was posted today. Want to join in on the fun, click on the picture to be taken to Crochet Memories; part 1 and other pertinent information is posted there.