Logo of <a href="https://en.wikipedia.org/wiki/Comtal_Corporation" class="extiw" title="en:Comtal Corporation">Comtal Corporation</a>
Comtal Corporation
Own trace, adapted from <a rel="nofollow" class="external free" href="http://s3data.computerhistory.org/brochures/comtal.image-systems.ca1974.102646321.pdf">http://s3data.computerhistory.org/brochures/comtal.image-systems.ca1974.102646321.pdf</a>