With that comparatively primitive system we were able to fly down to a height of 200 feet above the runway.

They have a primitive nervous system, but not a brain.

Communications companies have been testing primitive interactive systems for several years with mixed results.

"Computer security" in these early, primitive systems was at best an afterthought.

The group also says that shellfish, despite primitive nervous systems, can feel pain.

The disabled endure the indignities of a primitive medical system.

He also maintained the ship's feeble and primitive electrical system.

Within a few years he had a primitive system, and got a bit of press coverage.

The spider's primitive system of oxygen absorption would not support his mass!

Here, the theoretically more primitive infrared systems have no problem.