Expanded Universe

The Expanded Universe was created by Lucasfilm's Vice President of Licensing Howard Roffman in roughly 1986. The Expanded Universe was pitched to George Lucas as a parallel Universe canonically adjacent to George Lucas Universe in order for more creative freedom when it came to Licensing new Star Wars material after the theatrical run of the Original Trilogy.

C-Canon (Continuity Canon)
C-Canon or Continuity Canon

S-Canon (Secondary Canon)
S-Canon or Secondary Canon