legs — either of the two lower limbs of a biped, as a human being, or any of the paired limbs of an animal, arthropod, etc., that support and move the body.
stems — science, technology, engineering, and mathematics, considered as a group of academic or career fields (often used attributively): degree programs in STEM disciplines; teaching STEM in high school.
wheels — a circular frame or disk arranged to revolve on an axis, as on or in vehicles or machinery.
wings — either of the two forelimbs of most birds and of bats, corresponding to the human arms, that are specialized for flight.
parts — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
pins — a number assigned to an individual, used to establish identity in order to gain access to a computer system via an automatic teller machine, a point-of-sale terminal, or other device.
processes — a systematic series of actions directed to some end: to devise a process for homogenizing milk.