A can refer to:
- a piece of Textile or fabric used to repair a hole in a larger piece
- an Eyepatch , used in the treatment of Eye Disorders such as Amblyopia or Strabismus (referred to as patching), or for aesthetic purposes in covering an injured or missing eye
- Patch (computing) , a fix for a software program where the actual binary executable and related files are modified. Often this is used to repair a Software Bug
- Patch (Unix) , a UNIX utility that applies a script generated by the diff program to a set of files, allowing changes from one file to be automatically applied to another file.
- A 3-D Bézier Curve used in computer graphics, or a primitive in some 3-D software packages
- The name of an IBM utility to edit Binary File s (typically on mainframe installations, eg. MVS )
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