Differences Between HP-38G, HP-39G, HP-40G, HP-48S, SX, G, G+, GX, GII and HP-49G, G+



Feature
38G
39G
40G
48S
48SX
48G
48G+
48GX
48GII
49G
49G+
Memory
32kB
256kB
256kB
32kB
32kB
32kB
128kB
128kB
128kB
512kB
512kB
Expansion port
No
No
No
No
Yes
No
No
Yes
No
No
Flash card
Entry mode
Algebraic
Algebraic
Algebraic
RPN
RPN
RPN
RPN
RPN
RPN + Algebraic RPN + Algebraic
RPN + Algebraic
Serial port
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
USB
Performance index
21
17
17
83
83 ?
150 ?
150 ?
150
221
136
258
Housing
square, old
round
round
square
square
square
square
square
round
round
round
Keys
HP-style
Rubber
Rubber
HP-style
HP-style
HP-style
HP-style
HP-style
advanced rubber
Rubber
advanced rubber
Software

(3)
(3)

(1)
(2)



Mostly compatible with 48S

Programming
Aplets
Aplets
Aplets
RPL
RPL
RPL
RPL
RPL
RPL
RPL
RPL
CAS (Computer Algebra System)
No
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Infrared port
Yes
Yes
No
Yes
Yes Yes Yes Yes Yes
No
Yes
Printing

IR
Ser?
IR/Ser
IR/Ser
IR/Ser
IR/Ser
IR/Ser
IR/Ser Ser
IR
Data exchange

IR/Ser
Ser
IR/Ser
IR/Ser
IR/Ser
IR/Ser
IR/Ser
IR/Ser
Ser
IR/Ser
Introduction
4/1995
2000
2000
4/1991
3/1990
1/1995
3/1998
6/1993
11/2003
5/1999
11/2003

Differences between HP-38G, HP-39G and HP-40G are described in the HP-39G/HP-40G User's guide.

1.
Compared to 48S: Additional realtime clock, calendar software.
2.
Compared to 48S/SX: Better software.
3.
Compared to HP-38G: Additional Memory Manager, extended plot features, added Inference, Trig Explorer and Quadratic Explorer aplets.

See here for another comparisn sheet (PDF).