  These proceedings collate lectures given at the twenty-seventh specialized
course organised by the CERN Accelerator School (CAS). The course was held at
the Ettore Majorana Foundation and Centre for Scientific Culture (EMFCSC) in
Erice, Italy, from 24 April to 4 May 2013. Following recapitulation lectures on
basic accelerator physics and superconductivity, the course covered topics
related to the design, production and operation of superconducting RF systems
and superconducting magnets for accelerators. The participants pursued one of
six case studies in order to get 'hands-on' experience of the issues connected
with the design of superconducting systems. A series of topical seminars
completed the programme.
