• Billboards - a flat surface or board, usually outdoors, on which large advertisements or notices are posted
• Books - a number of sheets of paper, parchment, etc. with writing or printing on them, fastened together along one edge, usually between protective covers.
• Comic Books - a magazine that contains stories told in pictures.
• Magazines - a publication with a paper cover which is issued regularly, usually every week or every month, and which contains articles, stories, photographs, and advertisements.
• Newspapers - a publication consisting of a number of large sheets of folded paper, on which news, advertisements, and other information is printed.
• Periodicals - a publication issued at regular intervals, usually monthly or weekly
• Posters - a large notice or picture that you stick on a wall or board, often in order to advertise something.

All definitions can be found on the Collins Dictionary

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