US sc - single crochet 

UK dc - double crochet

 

US hdc - half double crochet

UK htr - half treble crochet

 

US dc - double crochet

UK tr - treble crochet

 

US tr - treble or triple crochet

UK dtr - double treble crochet

 

US dtr - double treble crochet

UK trtr - triple treble crochet

 

US yo - yarn over

UK yoh - yarn over hook

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US gauge

UK tension