I'd suggest to study this glossary.
line organization An organization in which there are direct
two-way lines of responsibility, authority, and communication running
from the top to the bottom and back to the top of the organization,
with every employee reporting to only one specific supervisor.
line personnel Employees who perform functions that
contribute directly to the primary goals of the organization.
staff personnel Employees who perform functions that advise and assist line personnel
in achieving their goals.
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