Rail systems are small pieces of metal put on any given surface on a gun to allow attachment of some sort of accessory.

This typically allows direct attachment of system hard drives.

This allows attachment to animals by making the seeds able to travel on long distances.

As the obstetrics staff pleaded with her to allow attachment of a fetal monitor, Ms. Zimmerman at first refused.

The printed circuit board was sized so as to allow attachment to an 8 inch floppy disk drive.

The design also allowed easy attachment of accessories, as well be easily adjustable in power.

The rack has internal mounting provisions to allow attachment of secondary structure.

The 335 uses large main-bearing caps, allowing 4-bolt attachment on some engines.

Internal loops allow attachment of coordinating sleeping bag liner, sold separately.

Allows attachment of hyperlinks and annotations to the clips.