Erable
| Erable | |
|---|---|
| Developer(s) | Bernard Parisse, Mika Heiskanen, Claude-Nicolas Fiechter | 
| Initial release | 1993 | 
| Stable release | 4.20060919 (2006-09-19)
   /    2009-04-21/2012-04-26 | 
| Written in | System RPL | 
| Type | Computer algebra system | 
| License | LGPL | 
| Website | www-fourier | 
Erable is a computer algebra system (CAS) for a family of Hewlett-Packard graphing scientific calculators of the HP 40, 48 and HP 49/50 series.