A visiting card, also known as a calling card, is a small paper card with one's name printed on it, and often bearing an artistic design. In 18th century Europe, the footmen of aristocrats and royalty would deliver these first European visiting cards to the servants of their prospective hosts solemnly introducing the arrival of their owners.

History
Visiting cards became an indispensable tool of etiquette, with sophisticated rules governing their use. The essential convention was that one person would not expect to see another person in his own home (unless invited or introduced) without first leaving his visiting card for the person at his home. Upon leaving the card, he would not expect to be admitted at first, but might receive a card at his own home in response. This would serve as a signal that a personal visit and meeting at home would be welcome. On the other hand, if no card were forthcoming, or if a card were sent in an envelope, a personal visit was thereby discouraged. As an adoption from French and English etiquette, visiting cards became common amongst the aristocracy of Europe, and also in the United States. The whole procedure depended upon there being servants to open the door and receive the cards and it was, therefore, confined to the social classes which employed servants.

If a card was left with a turned corner it indicated that the card had been left in person rather than by a servant.

Next day Paul found Stubbs' card on his table, the corner turned up. Paul went to Hertford to call on Stubbs, but found him out. He left his card, the corner turned up.

—Evelyn Waugh, Decline and Fall, Part III, Chapter 7, Resurrection
Some visiting cards included refined engraved ornaments, embossed lettering, and fantastic coats of arms. However, the standard form visiting card in the 19th century in the United Kingdom was a plain card with nothing more than the bearer's name on it. Sometimes the name of a gentlemen's club might be added, but addresses were not otherwise included. Visiting cards were kept in highly decorated card cases.

The visiting card is no longer the universal feature of upper middle class and upper class life that it once was in Europe and North America. Much more common is the business card, in which contact details, including address and telephone number, are essential. This has led to the inclusion of such details even on modern domestic visiting cards, a practice endorsed by modern books of etiquette, such as Debrett's New Etiquette.

Business cards are cards bearing business information about a company or individual. They are shared during formal introductions as a convenience and a memory aid. A business card typically includes the giver's name, company affiliation (usually with a logo) and contact information such as street addresses, telephone number(s), fax number, e-mail addresses and website. It can also include telex, bank account, tax code. Traditionally many cards were simple black text on white stock; today a professional business card will sometimes include one or more aspects of striking visual design.

Construction
Business cards are printed on some form of card stock, the visual effect, method of printing, cost and other details varying according to cultural or organizational norms and personal preferences. The common weight of a business card varies some by location. Generally, business cards are printed on stock that is 350 g/m² (density), 45 kg (100 lb) (weight), or 12 pt (thickness).

High quality business cards without full-color photographs are normally printed using spot colors on sheet-fed offset printing presses. Some companies have gone so far as to trademark their spot colors (examples are UPS brown, Los Angeles Lakers' purple, and Tide's orange). If a business card logo is a single color and the type is another color, the process is considered two color. More spot colors can be added depending on the needs of the card. With the onset of digital printing, and batch printing, it is now cost effective to print business cards in full color.

Collecting
There are several hundred known collectors of business cards, especially antique cards, celebrity cards, or cards made of unusual materials. One of the major business card collectors' clubs is the International Business Card Collectors, IBCC. IBCC members exchange cards with other members, simply for the price of postage. Collectors often shorten the words "business card" to BC to make e-mail discussion easier