Some of my newbie readers have asked what the difference is between a serger and a coverstitch machine: Here is a brief explanation :)
A coverstitch is the twin or triple needle stitching you see on the hems of most ready-to-wear knit garments. The top looks like parallel rows of straight stitching and the underside looks like serger loops which *cover* the turned down raw edge. Sometimes the "wrong" or loopy side is sewn on top as a design feature, especially in activewear
A Serger is used to finish off raw edges with a clean and unfraying finish, also used for hems and joining pieces together (sometimes you may need attachments) The serger sews much faster then a sewing machine but should be used as a supplement to your machine not as a multi-funstion machine.