<< explain the difference between Management information systems versus information systems >>
It varies from school to school, but I'll try to explain it the best I can using my university's standards.
MIS focuses more on the business aspect, but does give you a lot of valuable computer knowledge. MIS majors are often used as the middleman between upper management and the high-tech geeks; also, they're suitable for Systems Analysts jobs, Network Administrators, etc. In all, if you don't want to sit in a room doing computer programing all day, and you don't like computer engineering enough to make a career out of it, yet you still want to be heavily involved with computers, MIS is probably for you.
Information Sciences, on the other hand, is more computer science than management. You'll do a lot of programming, and most likely a lot of computer engineering stuff as well, while at the same time learning the basics of the business world. IS is a great platform to gain knowledge towards an MBA, in my opinion.
After looking into all three, I finally decided to go with MIS along with a Computer Science and Economics minor. All in all, I think it'll be best for me.