- X Ray (1)
- Xanthorrhoeaceae (8)
- Xerography (2)
- Xerography—equipment and Supplies (1)
- Xerox (2)
- Xerox Corporation Palo Alto Research Center (2)
- Xerox Integrated Printing System (1)
- Xerox Xe 500 Series (1)
- Xerox Xe 520 5 (1)
- Xerox Xe 550 (2)
- Xerox Xe 550 5 (1)
- Xiajing Xian (Shandong) History Sources (4)
- Xiangcheng Xian (Henan) History Sources (4)
- Xiangshan Xian (Zhejiang) History Sources (2)
- Xiaoshan Xian (Zhejiang) History Sources (4)
- Xiayi Xian (Henan) History Sources (4)
- Xinchang Xian (Jiangxi) History Sources (1)
- Xingning Xian (Guangdong) History Sources (2)
- Xingshan Xian (Hubei) History Sources (1)
- Xinzhou (Shanxi) History Sources (1)
