Can you still work with other kinds of software if you are a Computer Software Engineer?

What I mean by that question is, if you learn how to develop and create software on a computer, can you use that knowledge to develop software on devices other than computers (Examples: Software for video game consoles like PS3's, Wii's, and Xbox's; Handheld Portable Devices like tablets, phones, ipods, PSP's)? Or is that knowledge specifically only for computers?