Magic (illusion) deals with the use of illusions and tricks to give the appearance of magical phenomena, with intent to amuse.
The term magician can refer to a practitioner of either paranormal magic or illusionism. See list of magicians (illusionists); list of occultists (paranormal)
Magic may refer to a United Kingdom television channel. See: Magic TV
Magic refers to the decrypted messages produced by US cryptographers in WWII -- it is usually taken to mean '... from Japanese intercepts'. The equivalent in the UK was Ultra, referring to decrypted German traffic.