English: Original caption: "E. Mark Smith of CADRE is seen here digitizing a drawing of a school building. Mark recently purchased a complete digitizing workstation including the PowerPak 286 Computer, software, Houston Plotter and Scanner. Mark is now offering a service to digitize drawings." From a 1987 advertisement from Puget Sound ComputerUser for Evergreen Systems, an authorized AutoCAD dealer.
Modified from File:Evergreen Systems - AutoCAD 2.6 - May 1987 Puget Sound ComputerUser "CAD POWER!" advert.jpg: cropped, yellow tint removed, brightness and contrast adjusted.
This advertisement did not have a copyright notice and is in the public domain.
From the US Copyright Office Circular 3. Page 3, Contributions to Collective Works. (A magazine is a "collective work.")
A notice for the collective work will not serve as the notice for advertisements inserted on behalf of persons other than the copyright owner of the collective work. These advertisements should each bear a separate notice in the name of the copyright owner of the advertisement.
This advertisement (or image from an advertisement) is in the public domain because it was published in a collective work (such as a periodical issue) in the United States between 1978 and March 1, 1989 and without a copyright notice specific to the advertisement, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in jurisdictions that do not apply the rule of the shorter term for US works, such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties. See this page for further explanation.