I use the Free24 app on my phone, which emulates the HP 42S.
On my computer, I've been starting to use Emacs's calc-mode,
but it's annoying to not know exactly which keys to press to
emulate each key on the 42S.  Hence:

---	y^x	x^2	10^x	e^x	---	| ^ RET* HE E
---	1/x	sqrt	log	ln	---	| & Q HL L
						|
---	---	pi	asin	acos	atan	| P IS IC IT
---	---	---	sin	cos	tan	| S C T
						|
-----------	---	modes	disp	clear	| m{rd} d{fse} q
enter		x↔y	+/-	E	←	| RET TAB n e DEL
						|
---	---	---	matr	---		| v,[]
---	7	8	9	/		| 7 8 9 /
						|
---	base	conv	---	prob		| dr c{dr} !,kc
---	4	5	6	*		| 4 5 6 *
						|
---	---	---	---	---		|
---	1	2	3	-		| 1 2 3 -
						|
---	---	---	---	---		|
exit	0	.	---	+		| q 0 . +