In this paper the Lie
structure of prime rings of characteristic 2 is discussed. Results on Lie ideals are
obtained. These results are then applied to the group of units of the ring, and also to
Lie ideals of the symmetric elements when the ring has an involution. This work
extends recent results of I. N. Herstein, C. Lanski and T. S. Erickson on prime rings
whose characteristic is not 2, and results of S. Montgomery on simple rings of
characteristic 2.