Which file format is primarily associated with Adobe Illustrator projects?

The file format primarily associated with Adobe Illustrator projects is AI. This is the native file format created by Adobe Illustrator, designed to store vector graphics and allows for the editing of images while maintaining the quality of the artwork. The AI format supports layers, transparency, and a wide range of color modes, making it ideal for graphic design work that often requires precise manipulation of vector images.

While other formats such as AIT, INDD, and EPS may be relevant in different contexts, they do not serve as the main file type for Illustrator projects. AIT is a template file format for Illustrator, INDD is associated with Adobe InDesign, a different application used primarily for layout design, and EPS is a versatile file format that can work across various graphic applications but is not specific to Illustrator. Thus, AI stands out as the recognized standard for saving and working on Illustrator files.