A legacy system is all of the following, except:
a) Usually found on a mainframe
b) A system that is already in place, from the past
c) A system that often holds the middle tier of a multiple-tier system.
d) Old systems that often require hard-to-use command languages
e) Systems that most often have detailed information that can be accessed by a system at a higher tier.
Answer: A system that often holds the middle tier of a multiple-tier system.