For those wondering which knives traditionally have half stops and which knives have cam ends, here is a simple(and GENERAL) rule of thumb:
Round-ended knives have cam ends ie., Whittlers, stockmen, toothpicks, toenails, knives with sunk joints, etc. Square ended knives (some of which may have a radiused end but are NOT CONSIDERED ROUND ENDS)
have half stops, ie Trappers, jacks, hunters, etc.
Keep in mind, with slip joints, there are exceptions that defy generalizations BUT this generalization works most of the time. You can find knives that have both half stop and cam end blades in them. I like those because they have something for everyone.
your mileage may vary/void where prohibited by law/do not remove this label under penalty of death/no smoking/brush your teeth after every meal/blahblahblahyakityschmakity