HP18C		HP17B
		tot # keys		72		37
		# generic shift keys (i.e. "f", "g")		1		1
				gold		gold
		# marked shifted fcns (f ASIN, etc.)		36		9
		# unmarked shifted fcns (f·¹ ASIN)		0		0
		# functional shift keys (i.e. "DSP", "STO")		2		2
				STO,RCL		STO,RCL
		# unmarked shifted fcns (DSP n, etc.)		8		20
		# 3-key generic shifted A		4		4
				STO +-x÷		STO +-x÷
		# fcns per 3-key generic shifted A		4		10
		# 4-key sequences B		1		1
				STO gold ^		STO gold y^x
		# fcns per 4-key seq B		4		10
		# menus		23		30
		# menu fcns		125		237
		# primary keys		69		34		tot # keys - tot # shift keys
		tot # primary fcns		62		27		# primary keys - # functional shift keys
		tot # shift keys		3		3		# generic shift keys + # functional shift keys
		tot # 2-key shifted fcns		44		29		# marked shifted fcns + # unmarked shifted fcns
		tot # 3-key sequences		16		40		(# 3-key sequences A * # fcns per 3-key seq A)
		tot # 4-key sequences		4		10		(# 4-key sequences B * # fcns per 4-key seq B)
		# menu functions		125		237
		tot # Menu keystrokes		278		569
		tot # functions		251		343		# primary keys + tot # 2-key shifted functions + tot # 3-key sequences
		Keyboard Clutter (# fcns per key)		1.431		1.189		tot # fcns on keyboard / tot # keys
		Keystroke Count		492		814		# primary keys + (2 * tot # shifted functions) + (3 * tot # menu functions) + (3 * tot # 3-key sequences)
		Keystroke count per function		1.960		2.373		Keystroke count / total # functions
	Click here for HP18C Detailed Keyboard Metrics					Click here for HP17B Detailed Keyboard Metrics