A method of determining a characteristic of handedness, comprising: sensing a rotation of a handheld device; determining a direction of rotation based at least in part on accessing information indicative of a first position state prior to sensing the rotation; and accessing information indicative of a second position state subsequent to sensing the rotation; and determining the characteristic of handedness based at least in part on the direction of rotation, the first position state, and the second position state, characterized in that determining the characteristic of handedness comprises at least one of: identifying a left-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a counterclockwise rotation relative to a user, identifying a left-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a clockwise rotation relative to the user, identifying a right-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a clockwise rotation relative to the user, or identifying a right-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a counterclockwise rotation relative to the user. sensing a rotation of a handheld device; determining a direction of rotation based at least in part on accessing information indicative of a first position state prior to sensing the rotation; and accessing information indicative of a second position state subsequent to sensing the rotation; and determining a direction of rotation based at least in part on accessing information indicative of a first position state prior to sensing the rotation; and accessing information indicative of a second position state subsequent to sensing the rotation; and accessing information indicative of a first position state prior to sensing the rotation; and accessing information indicative of a second position state subsequent to sensing the rotation; and determining the characteristic of handedness based at least in part on the direction of rotation, the first position state, and the second position state, characterized in that determining the characteristic of handedness comprises at least one of: identifying a left-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a counterclockwise rotation relative to a user, identifying a left-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a clockwise rotation relative to the user, identifying a right-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a clockwise rotation relative to the user, or identifying a right-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a counterclockwise rotation relative to the user. identifying a left-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a counterclockwise rotation relative to a user, identifying a left-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a clockwise rotation relative to the user, identifying a right-hand operation according to a first position state of facing-down and a second position state of facing-up as a result of a clockwise rotation relative to the user, or identifying a right-hand operation according to a first position state of facing-up and a second position state of facing-down as a result of a counterclockwise rotation relative to the user.