Software developers often use social media (such as Twitter) to share programming knowledge such as new tools, sample code snippets, and tips on programming. One of the topics they talk about is the software library. The tweets may contain useful information about a library. A good understanding of this information, e.g., on the developer’s views regarding a library can be beneficial to weigh the pros and cons of using the library as well as the general sentiments towards the library. However, it is not trivial to recognize a library sense of a word from its normal senses. For example, a tweet mentioning the word pandas may refer to the Python pandas library or to the animal. In this work, we created the first benchmark dataset and investigated the task to distinguish whether a tweet actually refers to a programming library or something else. Recently, the pre-trained Transformer model (PTM) has achieved great success in the fields of natural language processing and computer vision. Therefore, we extensively evaluated a broad set of modern PTMs, including both general-purpose and domain-specific ones, to solve this programming library recognition task in tweets. Experimental results show that the use of PTM can outperform the best-performing baseline methods by up to 5% - 43% in terms of F1-score on within-, cross-, and mixed-library settings.