sys-tem/'sistam/
noun- a set of connecting things or parts forming a complex whole, in particular.
- a set of principles or procedures according to which something is done, an organised scheme or method.
thing/THiNG/
noun- all that can be described in the specified way.
- informalwhat is needed or required.
- informalone's special interest or concern.
- informalused to introduce or emphasize an important point.