What are some good shelf-stable snacks for diabetics?

If you’re diabetic, you really have to watch the number of carbs you consume. However, most vending machine snacks are nothing but carbs in various forms, whether sweet or savory, because they’re easily made into shelf-stable servings.

What are some more protein-centered, shelf-stable snacks that, say, your typical desk jockey could keep in a drawer until the need strikes? Beef jerky, yeah, and nuts, but there must be more…