PNG stands for Portable Network Graphics.
Umm... I guess any. But only if the size isn't larger than 1600x1200 (I think that's the max size). JPGs, BMPs and PNGs (those I use), however PNGs load quite long, BMPs also some longer than JPGs.
Yes, certainly! GrafixNepal is providing free PNGs relating to Nepal.
There are PNGs, backgrounds, textures, stock photos, layouts, and a whole lot more. Splatteredpaint.com neo-faeriewings.co.nr Neo-luv.com have a lot
You can find a biohazard symbol amongst others on Openclipart. All images are offered in both lossless SVGs and in lossy PNGs, royalty free and in the public domain, allowing you to use them without restrictions.
Open Paint on your computer, draw something, and click Save As. A small drop-down menu below your picture will let you select what type of file you can save your picture as. Choose PNG and save. (If you want a picture you took with a camera to be a PNG, open it on Paint, and save it as a PNG!)
The preview problem is due to the browser/file explorer not having the code to make thumbnails from the .png. The "any other program" problem sounds weird- if you cannot open the .png in MS Paint, IrfanView, GIMP or anything else then the .pngs are corrupt.
Definition is the same as meaning.
stipulative definition is stipulative definition
Definition
There is no legal definition for pole star.There is no legal definition for pole star.There is no legal definition for pole star.There is no legal definition for pole star.
the two types of definition are the formal and informal definition.
definition feasible region definition feasible region