Disclaimer: Graphic software has come a long way over the years, resulting in a lot of line-blurring between programs. Raster-based images can be embedded into Adobe Illustrator and vectors can be placed and even created in Photoshop. With this in mind, consult a graphic designer when in doubt. Make sure the designer provides vector logo files when having your logo updated and ask your printer to double-check the resolution of images when having material professionally printed.
