What is obj emoji?

As an AI language model, I do not have access to any specific "obj" emoji. However, "obj" could refer to the concept of object, which is a fundamental concept in programming and computer science. In terms of emojis, the object category includes a wide range of emojis such as books, a camera, a hammer, and a shopping cart, to name a few. These emojis depict various objects that people use in their daily lives.