HP-41C style RPN scientific calculator
hp
HP-41C
USER
GRAD
RAD
f
ENTRY
T
0.0000
Z
0.0000
Y
0.0000
X
0.0000
SIGMA-
SUM
SIGMA+
yˣ
1/x
1/x
x²
√x
√x
10ˣ
LOG
LOG
eˣ
LN
LN
%
x≷y
x≷y
R↑
R↓
R↓
SIN⁻¹
SIN
SIN
COS⁻¹
COS
COS
TAN⁻¹
TAN
TAN
f
g
M+
STO
STO
M-
RCL
RCL
CLST
CLx
CLx
LST x
ENTER
ENTER
ABS
CHS
CHS
π
EEX
EEX
CLx
←
←
x²
7
FIX
SIN⁻¹
8
SCI
COS⁻¹
9
ENG
MOD
÷
÷
TAN⁻¹
4
DEG
x√y
5
RAD
yˣ
6
GRD
%CH
×
×
→HMS
1
→HMS
→HR
2
→HR
→RAD
3
→RAD
Re≷Im
−
−
10ˣ
0
→DEG
π
.
SEED
ABS
x²
SGN
x̄
+
+