Thanks to ...

Many people helped me during the creation and distribution of Erable:

• Claude-Nicolas Fiechter and Mika Heiskanen for letting me use their long integer routines for Erable. Special thanks to Mika for explanations about the source code of ALG48.
• Some of my students and netsurfers tested various versions of Erable and encouraged me to improve it: particularly Maurice Al-Khaliedy, Christophe Burdin, Craig Clifford, Jerome Coss, David Czinczenheim, Ludovic Dumaine, Eduardo (maciasval@mx2.redestb.es), Frederic Hermann, Eric Gorka, Stephane Monboisset, Lionel Pilot, Eric Saya, Quan Tong Duc, Samy Venin, John Wilson ... Special thanks to Gilles Virone who showed me first what an HP28/48 is able to do.
• Some math teachers, particularly Renée de Graeve and Scott Guth who made tests, suggestions and bug reports.
• all anonymous ftp sites administrators, particularly those of fourier.ujf-grenoble.fr (André Voutier), ftp.funet.fi, cbs.cis.com, hplyot.obspm.fr, hpcvbbs.cv.hp.com and wuarchive.wustl.edu,
• I used the following softwares to create Erable: the EQSTK, JAVA stack displays ([#!EQSTK!#], [#!JAVA!#]), the TED and Miniwriter editors ([#!TEDVV!#], [#!mini!#]), the JAZZ debugger ([#!JAZZ!#]), the Metakernel ([#!MK!#]), various compilers (JAZZ, the HP tools ([#!HP!#]), the RPL based tools ([#!RPL48!#]) and eventually the GNU tools ([#!gtools!#]).
• I looked at the following book and softwares: [#!ALG48!#], [#!CL!#], [#!CF!#], [#!DST!#], [#!Fe!#], [#!Ga!#], [#!POLYLIB!#], [#!MuPAD!#] . One of the best reference is certainly [#!DST!#] and references therein. M. Heiskanen's WWW-homespage has a lot of interesting math links.