(In short, this means that you can copy and modify the image freely as long as you provide attribution; preferably in the form of a link back to this page.)
A circuit symbol. Originally used on Wikibooks:Electronics. Especially useful in tables of images. See User:Omegatron/Gallery for examples. Uploaded by [http://tiredbrain.com/wikimedia/commonplace/ Wikimedia Commonplace] Source: Created by [[