Model		hp 49g		hp 48gx		hp 38g
Display		131 x 64 pixel high-contrast LCD		8 line x 22 char. LCD		8 line x 22 char. LCD
Entry system logic		RPN, Assembly and HP Basic		RPN		Algebraic
Memory- RAM/ROM		1.5 MB, unlimited within available memory		128 KB, unlimited within available memory		32 KB, unlimited within available memory
Sample Std deviation/ mean/ weighted mean		Yes		Yes		Yes + Population standard
Forecasting, correlation coefficient		Yes		Yes		n/a
LOG, 10x, PI, x		Yes		Yes		n/a
Built-in functions		Over 2300		Over 2300		Over 600
Customization Method		HP Solve/RPL		HP Solve/RPL		HP Solve
Clock, calendar, appointments and alarms		Yes		Yes		n/a
Date arithmetic		Yes		Yes		n/a
Base conversions and arithmetic		Yes		Yes		No
Bit, Boolean operations		Yes		Yes		No
Cylindrical, spherical		Yes		Yes		No
APLETS (built-in or added applications including Note and Sketch menus)		No		No		Yes
graphing functions with interactive graphics		3D		3D		2D
notepad		Yes (through variables)		Yes (through variables)		Yes (built-in)
Normal, X, t, F distribution		Yes		Yes		No
Decimal hrs/hrs.min.sec. conversions		Yes		Yes		No
Unit conversions		Yes		Yes		No