In the English-speaking crochet world, the basic stitches have different names.
The differences are usually referred to as UK/US or British/American. Examples of these differences and their usual abbreviations are:
UK double crochet (DC) = US single crochet (SC)
UK treble crochet (TR) = US double crochet (DC) and so on.
To help counter confusion when reading patterns, a diagramming system using a standard international notation has come into use (illustration, right).