243190-001   1997/01/17
243190-001a  1997/04/07 : Minor changes on page 2, actual contents identical
243190-001b  1997/09/22 : Much better compression, no content change

243191-001   1997/01/21
243191-001a  1997/04/07 : Minor changes on page 2, actual contents identical
243191-001b  1997/09/22 : Much better compression, no content change

243190-002   1999/04/23
243190-002a  1999/05/07 : Many editorial changes to floating-point content (mostly hyphenation); no semantic changes

243191-002   1999/02/23
243191-002a  1999/05/27 : Many editorial changes to floating-point content; pages partially renumbered; minor changes to SIMD documentation; no substantive changes