A fid is a conical tool traditionally made of wood or bone. It is used to work with rope and canvas in marlinespike seamanship. A fid differs from a marlinspike in material and purpose. A marlinespike is used in working with wire rope, may be used to open shackles, and is made of metal. A fid is used to hold open knots and holes in canvas, and to separate the "lays" (or strands) of synthetic or natural rope for splicing. A variation of the fid, the gripfid, is used for ply-split braiding. It adds a jamming cleat to pull a cord back through the cord split by the fid's point.

Modern fids are typically made of aluminum, steel, or plastic. In addition to holding rope open to assist the creation of a rope splice, modern push fids have markings for precise measurements in a variety of sizes of rope. The length of these fids is typically 21 or 22 times the diameter of rope to be spliced. A half-inch diameter rope would have any accompanying fid 10.5-11" in length with hash-marks denoting the long and short fid measurements. A short fid is ¹⁄₃ a fid length and a long fid is ²⁄₃ the overall fid length.

vnmr is software for controlling nuclear magnetic resonance spectrometers. It is produced by Varian, Inc.

The software runs on SPARC machines with Solaris. It is composed of a command line interpreter window, an output window, and a status window.

The successor of vnmr is called vnmrJ.

Buttons

There are a number of buttons to perform specific tasks.

Command line interpreter

Main commands:

Beginning with "d" are a number of commands for displaying things:

A fid is a hollow spike for use in splicing.

FID can mean: