CJK Unified Ideographs
The Chinese, Japanese and Korean (also known as CJK) scripts share a common background, collectively known as CJK characters. During the process called Han unification, the common (shared) characters were identified and named CJK Unified Ideographs. As of Unicode 17.0, Unicode defines a total of 101,996 characters.
The term ideographs is a misnomer, as the Chinese script is not ideographic but rather logographic, but was chosen for being more common in English.
Until the early 20th century, Vietnam also used Chinese characters (Chữ Nôm), so sometimes the abbreviation CJKV is used.