KnitKing Compuknit IV is the brand name of the Japanese knitting machine made by Brother. It is also known as Brother KH940. The other brand name of the same machine is Topical -3 (yes, the same as an alternative name for the KH930 machine, which again emphasizes the very close similarity between KnitKing IV and KnitKing III).
KnitKing IV is identical to KnitKing III but has slightly more memory.
Read all the details of KH940 including its pros, cons, and differences from other electronic machines in a separate post.
And in the meantime, enjoy the pictures below of the wonderful KnitKing IV knitting machine.