@Mike: I don't think Michel was looking for a CBT (apart that it IS really interesting for 1st steps).

@Michel: Please correct me if I'm wrong, but I suppose you asked for a comparison table/matrix about the differences of the entry notations. I give an example:

17-4x3=5

hp RPN (classic)

--> 17 ENTER 4 ENTER 3 x -

hp RPN including algebraic notation:

hp algebraic notation of newer high end calculators is far away from the classic RPN entry notation. I don't own any 48/49 but have a look at the article about RPL (http://www.hpmuseum.org/rpl.htm) here and you will notice the great difference.

hp algebraic calculators (e.g. 17Bx)

--> 17 - ( 4 x 3 = [or, if you wish, 17 - ( 4 x 3 ) =]

You NEED at least the 1st "(", because this simple algebraic notation has no precedence (^ before */ before +-)

hp solver in calculators (e.g. 17Bx)

--> X=17-4x3

The equation solver DOES know precedence and so it works without parenthesis!

hp CAS solver in calcluators (e.g. hp-40G)

I don't own and don't know the syntax, but CAS gives you exact algebraic expressions instead of approximated numerical values. See article at http://www.hpcalc.org/details.php?id=4999

I really too would like to have a comparison table that covers also the input notations of the other most important brands (TI, SHARP...).

Someone else?