Information Systems:

An information system is "a set or arrangement of things so
related or connected as to form a unity or organic whole; a set
of facts, principles, rules, etc. classified or arranged in a
regular, orderly form so as to show a logical plan linking the
various parts" (McKechnie, 1978). 

Component processes in an information system might include the
specification, collection, transmission, and processing of data,
and the display, dissemination, and use of information derived
from such data.  Specification is input; information use is
output; material resources are the hardware and software utilized
in the system processes; human resources are the users
interacting with the information system.  The information system
necessarily exists as a subsystem of a larger real-world system. 
The larger system constitutes the global environment of the
information system. 

<cfile11>   Information Organization
<cfile14>   Information Hierarchy
<cfile16>   Electronic Industrial Age vs. Information Age