Specifications for Hewlett Packard 9820A

Manufacturer:		Hewlett Packard, Calculator Products Division
Model Number:		9820A
Serial Number:		
Date of Manufacture:	1973
Manufactured In:	USA, Loveland, Colorado
Original Price:		$4975 (base)
Weight:			38 Pounds
Size:			19 1/2" Wide, 16" Deep, 7" High
Power Requirement:	120VAC 60Hz
Display Technology:	5x7 LED Dot-Matrix, 16 Character
Logic Technology:	4 Board Small Scale/Medium Scale Bipolar Mini Computer-like CPU
			Microprogrammed, LSI ROM Microcode Store
                        LSI Dynamic RAM Working/Program/Register Storage
Digits of Capacity:	10 + 2 Exponent, 2 Non-Displayed Guard Digits
Decimal Modes:		Scientific or Fixed at 0-9 digits behind decimal
Arithmetic Logic:	Full Algebraic, Conversational
Math Functions:		Four Function, Square Root
			Expandable with up to 3 ROM Packs, each ROM slot
			with block of 10 keys that are defined by ROM module
Constant:		N/A
Memories:		173, expandable to 429
Programmable:		Conversational "Language".  Labelled Branches, Conditionals
			Volatile RAM Program/Storage Register Memory
			Mag-Card Reader
Peripherals:		Built-in 16-column Thermal Printer
			Optional Printer, Plotters, Digitizer, Cassette Tape

Previous Machine:	Master H-1
Next Machine:		Canon Canola L121

Next in Series:		Hewlett Packard 9830A
Follow-On Machine:	Hewlett Packard 9825A

Related Machines:	Hewlett Packard 9100B
			Hewlett Packard 9810A
			Hewlett Packard 9830A
			Hewlett Packard 9815A
			Hewlett Packard HP-01
			Hewlett Packard 85


Patents:		US Patent Number 3,839,630
			US Patent Number 4,028,538
			US Patent Number 4,178,633
			US Patent Number 4,281,390
			US Patent Number 4,615,015


Web Links:		Dave Hicks' Museum of HP Calculators
			Steve Leibson's Essay on HP's 2nd Gen Calculators


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