You can use my images for non-commercial purposes

Unless otherwise specified, the words and images on this web site were created by J. Mark Esterly and are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
In other words, feel free to use any of my images from this web site for your non-commercial purpose, such as a desktop image on your personal computer, in a post on your personal blog, in your personal FaceBook content or in your Twitter feed. I only require that you: 1) don’t alter my image, and 2) for any online use clearly attribute the image to me and provide a link to www.markesterly.com.
You need permission to use my words or images for business purposes
It’s not OK to use my writing or any of my images for your commercial web site, or any other business purpose, without first discussing your project with me and getting my permission. Commercial projects include corporate marketing campaigns, non-profit fundraising campaigns, graphics for business web sites, brochures, advertising, and individual prints for display. Please contact me if you would like permission to use my words or images for your commercial project. Thanks for “playing fair” with my work.