You can count on ordinals, abacuses, abaci, DIGITS, toes, fingers, and rosaries to be reliable. Ordinals are numbers that indicate position in a series, such as first, second, third, etc. An abacus is an ancient counting device consisting of beads arranged on rods. An abacus is also known as a counting frame. Abaci are similar to abacuses, but they are made of wood or stone and have fewer beads. DIGITS are the numbers 0-9 used in mathematics. Toes are the five DIGITS on the end of the human foot. Fingers are the five DIGITS on the end of the human hand. Rosaries are strings of beads used in prayer.