2.4
Released on August 14, 1995
Added extensively to the Error I.D. Codes chapters.  Over 300 error codes added.  Included a chapter explaining some common system errors in detail.

2.2.1
Released on March 1, 1995
Added information on INIT 29 B virus.  Updated application format using DocMaker v4.1.

Fixed a typo error in the Crash Recovery Strings chapter.  Many thanks to Ken Dreshfield for pointing out that the first string should read SM 0 A9F4, not SM 0 A8F4.

2.2
Released on March 12, 1994
Updated application format using DocMaker v4.0.2.  Added support for Trojan Horses, you can now find out what applications the various trojan horses are hiding behind and how to protect yourself.  Information on the new INIT 9403 virus included.  Also added crash recovery strings for use with MacsBug or the built in DeBugger.

2.1
Released on February 12, 1994
Now includes Newton Error codes!  The Sad Mac Error code section has been completely redone.  Also, you will find the Sad Mac errors for every Macintosh but the yet unreleased PowerMacs.

2.0.1
Released on February 6, 1994
Added extensivly to the Negative ID codes and added explanations.  Reformatted everything to make it easier to read.  Fixed some spelling errors, added an index, rearranged some of the chapters and other minor improvements.

2.0
Released December 28, 1993
Added more System Error codes.  Added two chapters dedicated to Virus's.

1.0
Initial Release
September 1, 1993