It is very expensive to supplement your pictures with descriptions and keywords. Especially technical diagrams and abstract images are not useful supplement without knowledge on the subject. Due to the amount of images that are published without description at openclipart.org, you feel as a librarian soon as Don Quixote. - Please help us and write while uploading descriptions and tags for your images. - Thank you.
This is a completely free image Please help! - write descriptions and tags that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.