Step 1: Identify the task
The task is to list examples or characteristics that belong to the category of 搜索引擎 (search engines).

Step 2: Understand what 搜索引擎 (search engines) are
搜索引擎 (search engines) are software systems designed to search and retrieve data from the internet or a database based on keywords or queries entered by users.

Step 3: List examples of 搜索引擎 (search engines)
Examples include 百度 (Baidu), 谷歌 (Google), 必应 (Bing), and 雅虎搜索 (Yahoo Search).

Step 4: Consider other relevant information
Other relevant information might include meta search engines, specialized search engines (like those for academic papers or specific industries), and the functions they provide, such as indexing, caching, and result ranking.

Step 5: Provide a concise answer based on the steps above
属于搜索引擎的有 百度 (Baidu), 谷歌 (Google), 必应 (Bing), 雅虎搜索 (Yahoo Search) 等。