Below are links to the 501st Legion, Garrison and Squad logos. They are in EPS (vector) format, PSD (Photoshop), PNG (transparent background) and JPEG (raster) format. Vector files, such as EPS files, can be opened in any vector artwork software such as Adobe Illustrator, and can also be opened in software such as Adobe Photoshop.
When using the logos available, it is always preferred to use the EPS format as this format allows for infinite scaling without quality loss. As such, it is preferred that EPS format files are sent to vendors for the use in creating print materials, embroidery work (patches), coins, t-shirts, etc.