Back label on the HP-41C (the ALPHA Mode Keyboard)
ALPHA
ON
USER
PRGM
ALPHA
a
b
c
d
e
A
B
C
D
E
Σ
%
≠
<
>
F
G
H
I
J
APPEND
ASTO
ARCL
BST
K
L
M
SST
∠
$
CLA
N
O
P
–
7
8
9
Q
R
S
T
+
4
5
6
U
V
W
X
+
4
5
6
*
Z
=
?
/
0
·
AVIEW
:
space
,
R/S
Made in U.S.A.