Beef jerky is essentially beef that's been cut into strips, marinated[?], and dried (originally in the sun). The result is a strip of rather salty beef that can be stored for long periods of time, similar to pemmican.
In more recent times beef jerky has evolved into a snack-food, typically in the shape of a long rod, and heavily spiced.
... 18 to 24, 28.0% from 25 to 44, 25.8% from 45 to 64, and 17.2% who are 65 years of age or older. The median age is 41 years. For every 100 females there are 92.6 males. ...