  
  [1X1 [33X[0;0YPreface[133X[101X
  
  [33X[0;0YThis is one of the three main [5XGAP[105X books. It describes most essential changes
  from previous [5XGAP[105X releases.[133X
  
  [33X[0;0YIn  addition to this manual, there is the [13X[5XGAP[105X Tutorial[113X and the [13X[5XGAP[105X Reference
  Manual[113X  containing  detailed documentation of the mathematical functionality
  of [5XGAP[105X.[133X
  
  [33X[0;0YA  lot  of  the  functionality  of  the  system  and a number of contributed
  extensions  are  provided  as  [5XGAP[105X  packages,  and each of these has its own
  manual. New versions of packages are released independently of [5XGAP[105X releases,
  and   changes   between   package   versions   may  be  described  in  their
  documentation.[133X
  
