Editorial

As of this issue, the items published in this TRANSACTIONS are classified in three categories: papers, short papers, and letters-to-the-editor. Distinction between the first two categories will be exclusively on length, i.e., contributions that can be adequately described in less than about three pages of print will be considered short papers. Letters-to-the-editor will contain comments on previously published items, corrections, and other comments from our readers. In fact, we wish to encourage our readers to write to us-whether for publication or not-and tell us how they liked a particular issue or article, what they would like to see written about, and what they see as some of the more promising problems of engineering interest.