Barnacle (slang) in the field in order to correct a design or manufacturing defect. The term appears to have originated from the crustacean barnacle which is an animal that attaches itself to rocks, docks, ships, whales, and other objects where it grows. A barnacle in electronics is something added to the manufactured product. Typically a barnacle on a circuit board is very noticeable, much like the mollusc variety on a rock in the sea. While the term was originally used with electronic hardware, it has also migrated into the software industry where is it is used to describe software that is added
Nora Barnacle which gives her first name as "Norah", is dated 22 March. Her father, Thomas Barnacle, a baker in Connemara, was an illiterate man who was 38 years old when she was born. Her mother, Annie Honoria Healy, was 28 and worked as a dressmaker. Between 1886 and 1889, Barnacle's parents sent her to live with her maternal grandmother, Catherine Mortimer Healy. During these years, she began studies at a convent, eventually graduating from a national school in 1891. In 1896, Barnacle completed her schooling and began to work as a porteress and laundress. In the same year, her mother threw