From Wikipedia, the free encyclopedia: A "hello world" program is a software program that prints out "Hello world!" on a display device.
Product InformationExpress yourself! Pin on our attention-grabbing buttons. It's a great way to wear and share what's on your mind. Add them to a fun banner or fabric for a unique decorating twist. Collect 'em, trade 'em.
- 2.25 inch diameter
- Metal shell
- Mylar/UV protecting cover
- Pinned metal back
