Look up Yellow card in Wiktionary, the free dictionary.

Yellow card may refer to:

• A penalty card shown in many sports after a rules infraction
• "Yellow card", colloquial name for the IBM System/370 Reference Summary booklet in the 1970s (earlier editions were colored green)
• Yellowcard, a pop punk band
• Yellow Card Scheme, a United Kingdom initiative concerning reactions to medicines
• Carte Jaune, a vaccination certificate issued by the World Health Organization
• A card issued to United Kingdom troops in Northern Ireland, listing the rules of engagement

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