Button wiki:
>For other uses of the word button, see Button (disambiguation). A button is small disc- or knob-shaped object attached to cloth or an article of clothing. Buttons may be manufactured from an extremely broad variety of materials, including bone, ivory, metal, plastic, and wood. Buttons were first used by the Ancient Romans.The functional role of buttons is to fasten or cinch the openings of a garment. By sliding the button through a slit (the ) in the to which the first is to be held. The slit is only sufficiently wide to allow the button to be fully pushed through while still remaining stitched to the first piece of cloth.
See more at Wikipedia.org...
Contact wiki:
[act is part of the active component of an electric switch. Contacts generally consist of metal buttons or wires that are plated with a good electrical conductor that is also corrosion-resistant, such as gold or silver.In address books, sales organizations, and electronic organizer devices, a contact is the name, address, phone number, and other pertinent information related to a client, vendor, friend, relative, or other associate. See the vCard and hCard standards for sharing and publishing such contact information.
See more at Wikipedia.org...]