1. A sheet comprising a plurality of like-arranged computer printer printable self-adhesive label sets for use with a computer postage system, each of said computer printer printable self-adhesive label sets consisting of: a first label on a layer of self-adhesive label stock, comprising a postage indicia label, wherein the postage indicia label is adapted to be printed with a printing consisting of postage indicia, the postage indicia label comprising a postage label height and a postage label length, wherein the postage label height is greater than the postage label length; a second label on the layer of self-adhesive label stock, comprising a first one-dimensional barcode label, the first one-dimensional barcode label comprising a set of dimensions adapted for receiving a printing consisting of a first one-dimensional barcode representing a set of mailing identification information, the first one-dimensional barcode comprising a one-dimensional barcode length and a one-dimensional barcode height, the set of dimensions comprising a label length and a label height, the label length at least as long as the one-dimensional barcode length and the label height at least as high as the one-dimensional barcode height, wherein the label height is less than the postage label height, wherein the label height is less than the postage label length, wherein the label length is longer than the postage label length, and wherein the label length is longer than the postage label height; and a third label on the layer of self-adhesive label stock, comprising a second one-dimensional barcode label, the second one-dimensional barcode comprising the set of dimensions, and adapted for receiving a printing consisting of a second one-dimensional barcode representing a set of address information.